a stick of length 1 into two pieces, with the breakpoint being chosen uniformly at random over the stick. a right triangle t is drawn with the two smaller sticks as its legs. find the expected value of the square of the length of the hypotenuse of t.

Answers

Answer 1

The expected value of the square of the length of the hypotenuse of the triangle is 2/3.

The expected value of the square of the length of the hypotenuse of the triangle can be found using the following steps:

Let X be the random variable representing the length of the longer stick and Y be the random variable representing the length of the shorter stick.The breakpoint is chosen uniformly at random over the stick, so X and Y have a uniform distribution over [0, 1].The square of the length of the hypotenuse of the triangle can be found using the Pythagorean theorem: Z = X^2 + Y^2.The expected value of Z can be found by taking the expected value of each term in the equation and adding them: E(Z) = E(X^2) + E(Y^2).The expected value of X^2 and Y^2 can be found by integrating the square of X and Y over their respective ranges:

E(X^2) = ∫_0^1 x^2 * (1/1) dx = 1/3

E(Y^2) = ∫_0^1 y^2 * (1/1) dy = 1/3

  6. Therefore, E(Z) = 1/3 + 1/3 = 2/3.

So, the expected value of the square of the length of the hypotenuse of the triangle is 2/3.

Learn more about the application of the expected value concept here:https://brainly.com/question/24305645

#SPJ4


Related Questions

We are going to fit together the 3 shapes below at point b
Will ABC make a straight line (YES or NO)?
Explain your answer

Answers

Answer:

ABC won't make a straight line.

Step-by-step explanation:

The sum of the angles is equal to 190°, which is greater than 180° (the measure of the straight angle).

Answer:

NO

Step-by-step explanation:

if the 3 shapes are placed together at point B to form ∠ ABC

if ABC make a straight line then the sum of the 3 vertices = 180°

63° + 95° + 32° = 190° ≠ 180°

then

ABC is not a straight line

5. Which of the following are empty sets?
(a) {0}
(b) {x: x is an integer and 2x - 1 = 10}
(c) (even prime numbers)
(d) {even factors of 21} -) (even numbers between 2 and 5)

Answers

The terms empty set, null set, and void set are all used to describe a set that is empty of any elements.

What is meant by empty sets?

The empty set is the only set in mathematics that possesses no items; its size or cardinality is 0. While in other theories, its existence can be inferred, some axiomatic set theories guarantee the presence of the empty set by introducing an axiom of empty set.

An empty set is a set that contains no elements and can be represented by the symbol, which indicates that it is empty of elements. It has a definite number of elements since the finite set contains a countable number of items and the empty set has none. An empty set is a finite set since it has a cardinality of zero.

Therefore, the correct answer is option (c) (even prime numbers).

To learn more about empty set refer to:

https://brainly.com/question/28451267

#SPJ1

Select the correct answer from each drop-down menu.
A company manufactures CD drives that theoretically experience disc-read errors 1.2% of the time.
If a CD drive is tested for 250 read operations and fails 4 times, the empirical probability that a CD drive will fail is 0.016%
If the theoretical model is valid, the company would expect the empirical probability to decrease as the number of read operations
decreases
increases
Reset
Next

Does it increase or decrease

Answers

When the empirical probability that a CD drive would fail is 0.016%, there are four possible failures.

what is probability ?

The probability that a happening will occur or a claim will be true is measured by probability theory, a branch of mathematics. The probability of an occurrence is a value between 0 and 1 and 1, where about 0 represents how likely something event is always to occur and 1 represents certainty. A probabilities is a numerical illustration of the possibility that a specific occurrence will take place. Probabilities can also be expressed as percentages ranging from 0% to 100percentage or from 0 to 1. the ratio of the number of outcomes to the proportion of occurrences in a whole set of fairly probable options that lead to a specific occurrence.

given

Let n = number of operations and P = error.

P = .016

n = 250

Increase P and n.

.016 (250) = 4

When the empirical probability that a CD drive would fail is 0.016%, there are four possible failures.

To know more about probability visit:

https://brainly.com/question/11234923

#SPJ1

for what value(s) of a does the system have nontrivial solutions?

Answers

This equation has complex solutions and that means the system has no nontrivial solutions for real value of lambda.

[tex]\lambda = \frac{-6±\sqrt{-164} }{4} \\[/tex]

Now, According to the question:

Nontrivial Solutions of a System:

System of equations has a form:

AX = 0, X = (x , y, z)

System of equations has a nontrivial solutions if a determinant of a system is zero. If the determinant is not zero than the matrix has inverse and a nontrivial solution x=0. This can be said differently: The homogeneous system has the trivial solution if rank of A in the row reduced form of matrix is equal to the number of unknown variables. If rank of A is less than the number of variables then the system has nontrivial solutions.

λx + 2y + z = 0

x + 5y + 2z = 0

3x - λy + z= 0

So, we calculate and determinant :

[tex]\left[\begin{array}{ccc}\lambda&2&-1\\1&5&2\\3&-\lambda&1\end{array}\right][/tex]  [tex]= \lambda det\left[\begin{array}{ccc}5&2\\-\lambda&1\end{array}\right][/tex] [tex]-2det\left[\begin{array}{ccc}1&2\\3&1\end{array}\right][/tex] [tex]det\left[\begin{array}{ccc}1&5\\3&-\lambda\end{array}\right][/tex]

[tex]=2\lambda^2+6\lambda+25=0[/tex]

This equation has complex solutions and that means the system has no nontrivial solutions for real value of lambda.

[tex]\lambda = \frac{-6±\sqrt{-164} }{4} \\[/tex]

Learn more about Non-trivial solution at:

https://brainly.com/question/29910424

#SPJ4

The given question is incomplete, complete question is :

For which values of ? does the following system have nontrivial solutions

λx + 2y + z = 0

x + 5y + 2z = 0

3x - λy + z= 0

Express tan
I as a fraction in simplest terms.

Answers

The tangent of the corners of this right-angle triangle is 4/3.

What is the Pythagorean Theorem?

The Pythagorean theorem states, "In a right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides." The sides of this triangle were called the perpendicular, the base, and the hypotenuse.

The tangent of a right triangle angle is equal to the ratio of the opposite side to the adjacent side. So if we call the other side "x", we can set the following formula:

tan(θ) = 8/x

where θ is the angle from height 8. We can find the value of x using the Pythagorean theorem.

[tex]x^2 + 8^2 = 10^2\\x^2 = 100 - 64\\x^2 = 36\\x = 6[/tex]

So the tangent values ​​are:

tan(θ) = 8/6 = 4/3

Therefore, the tangent of the corners of this right triangle is 4/3.  

To learn more about Pythagoras' theorem refers to:

brainly.com/question/343682

#SPJ1

what does the entry of 1.00 indicate on the diagonal of the matrix?

Answers

Entry of 1.00 in the diagonal of the matrix indicate that it is a correlation matrix .

In the correlation matrix entries in the diagonal is equal to 1.00.In the table each random variable [tex]A_{i}[/tex] is correlated to the random variable [tex]A_{j}[/tex].They are related in the manner of value of A₁ : A₂ is same as the        A₂ : A₁.

For example :

              A₁                 A₂             A₃             A₄                A₅

A₁            1

A₂           2                  1

A₃           3                 4                  1

A₄           5                 6                  7               1

A₅           8                 9                 10              11                  1

Diagonal values is always equal to 1 as the relation between A₁ to A₁ is always equal to one.

Therefore, the entry of one on the diagonal of the given matrix represents it is a correlation matrix.

learn more about matrix here

brainly.com/question/29132693

#SPJ4

Mr. Anderson and Mrs. Brown both recorded the number of push-ups done by students in their class. They made line plots to display the data.

Select whether the value of each statistics is greater for Mr. Anderson's class, equal in both, or greater in Mrs. Brown's class based on the line plots.

1. Number of students who did push-ups :

2. Maximum number of push-ups :

3. Mean number of push-ups :

Answers

There were 37 pupils that completed push-ups. The maximum number of push-ups allowed is 32.

What is line plot?

A line chart, also known as a curve chart, is a type of chart that presents information as a succession of data points called "markers" that are connected by straight line segments. It is a simple form of chart that is used in many disciplines. A line plot is a linear graph that displays data frequency distributions along a number line. It is useful for analyzing data with a single specified value. Line plots are sometimes known as dot plots. A line plot depicting the distance traveled by 17 turtles in one hour is shown below (we know it is 17 turtles because there are 17 dots on the line plot).

Here,

Mr. Anderson's class=20

Mrs. Brown's class=17

Number of students who did push-ups is 37. Maximum number of push-ups is 32.

To know more about line plot,

https://brainly.com/question/16321364

#SPJ1

find n for which (5/6)^n is less than 0.00001

Answers

The n will be 12.175074 for which (5/6)^n is less than 0.00001.

We start by converting the target number to scientific notation: 0.00001 = 1 x 10^-5

Next, we take the logarithm base (5/6) of both sides:

n = log base (5/6) of (1 x 10^-5)

Using logarithm rules, we can simplify this to:

n = log base (5/6) of 1 - log base (5/6) of 10^-5

Using logarithm tables or a calculator, we find that:

log base (5/6) of 1 = 0

log base (5/6) of 10^-5 = -12.175074

So,

n = 0 - (-12.175074) = 12.175074

Therefore, n = 12.175074.

To learn more about less than here:

https://brainly.com/question/15012913

#SPJ4

Y= 2x + 1
y =x - 2
identify the point of intersection of a pair functions

Answers

Answer:

(-3,-5)

Step-by-step explanation:

2x+1=x-2

subtract 3 from both sides

x=(-3)

sub the value of x back into one of the equations

y=2(-3) + 1=-5

a study of 1000 randomly selected flights of a major airline showed that 769 of the flights arrived on time. what is the probability of a flight will not arrive on time?

Answers

The probability of a flight will not arrive on time is 231/1000

What is probability?

Probability is the function that measures the chances that an outcome of a random event will be as expected. In this way you can measure how likely it is that an event will happen.

Probability requested is equivalent to:

Flights arrive on time= 769

Total flights = 1000

P(arrive on time) = Flights arrive on time / Total flights

P(arrive on time) = 769/1000

P (not arrive on time) = 1 - 769/1000

P (not arrive on time) = (1000 - 769)/1000

P (not arrive on time) = 231/1000

Learn more about probability at: brainly.com/question/251701

#SPJ4

Please help me I’m desperate:(

Answers

Sammy's Bulk Store offers better buy.

The graph is for C = 0.4n.

How to determine which store offers the better buy for bottled water?

A unit rate is defined as the rate for one of something. For example, if 10 oranges cost $50, the unit rate will be $50/10 = $5 i.e.  $5 for one orange.

PART 1

In order to determine which store offers the better buy for bottled water, we need to calculated the unit rate for each store. That is:

Unit rate = price / number of items

In Value Market, $2.99 for 24 bottles:

Unit rate  = $2.99/24 = $0.12

Sammy's Bulk Store, $3.96 for 36 bottles:

Unit rate  = $3.96/36 = $0.11

Thus, Sammy's Bulk Store offers better buy

PART 2

For  Hot dogs:

In Value Market, $3.19 for a pack of 8:

Unit rate  = $3.19/8 = $0.4

C = 0.4n

Sammy's Bulk Store, $54.40 for a pack at 12:

Unit rate = $4.49/12 = $0.37

C = 0.37n

From the graph, we have point C = 4 and n = 10. Thus:

unit rate = C/n = 4/10 = 0.4

Thus, the graph is for C = 0.4n

Learn more about unit rate on:

brainly.com/question/19493296

#SPJ1

For each value of w determine whether it is a solution to 53=9w-1

-10
9
6
-1

Answers

Answer:

Hi.....Sorry bro...I can't understand...My bad, I am only 12 years old..

Answer:

6

Step by Step explanation:

If you replace the w with 6 you get 53.

On a piece paper, graph f(x)=2 x (0.5)^x. Then determine which answer choice matches the graph you drew.

Answers

For given function, Graph is provided in image.

What is a function?

A function is defined as a relation between a set of inputs having one output each. In simple words, a function is a relationship between inputs where each input is related to exactly one output. Every function has a domain and co-domain or range. A function is generally denoted by f(x) where x is the input. The general representation of a function is y = f(x).

There are several types of functions in math. Some important types are:

Injective function or One to one function: When there is mapping for a range for each domain between two sets.

Surjective functions or Onto function: When there is more than one element mapped from domain to range.

Polynomial function: The function which consists of polynomials.

Inverse Functions: The function which can invert another function.

Graph for function f(x)=2*(0.5)^x is provided in image.

To know more about functions visit the link

https://brainly.com/question/12431044?referrer=searchResults

#SPJ1

Maggie reads 1/3 of a book every 3/4 of a Week. How manny books does Maggie read?

Answers

Answer:

  4/9

Step-by-step explanation:

If Maggie reads 1/3 of a book in 3/4 weeks, you want to know how many books per week Maggie reads.

Books per week

To find Maggie's reading rate in books per week, divide books by weeks:

  (1/3 book)/(3/4 week) = (1/3)/(3/4) book/week

  = (1/3) · (4/3) book/week = 4/9 book per week

Maggie reads 4/9 books per week.

<95141404393>

Sue runs the 100-yd dash in 11.9 s, or
8.4 yd/s. If she could lower her time by
0.5 s, would she be better than average
for her age, which is 8.5 yd/s?

Answers

She needs to lower her head by 190 seconds by 0.5 seconds in order to go more quickly than the age-appropriate speed of 8.5 yards per second.

what is distance ?

Distance is the broad, directionless movement of a moving object. Distance can be characterized as the amount of territory an object has covered, regardless of something like the originating or ending location. Distance is defined as the extent or size of the difference between two places. The space between two positions and the distance traveled between them are not the same thing, it should be emphasized. The distance traveled is the entire length of a path that connects two places. Distance is the actual travel distance of a body. It is also known as path length. For instance, OP = 360 m would be the length of the path for an object traveling from point O to point P.

given

V = D/t = 100/9.8 = 10.20 yd/sec is the speed with D = 100 yds, t = 9.8 s.

Convert the distance in yards for d = 100 meters, 1 yd/0.9144 m = 109.36 yds (1 yd = 0.9144 m d = 100 meters)

t=d/V=109.36 yards/10.20 yards per second = 10.72

The sprinter will finish the 100.0 meters in 10.72 seconds.

The sprinter's velocity is given by V = (10.20 yards per second)(0.9144 meters per yard) = 9.3 m/s.

Running 1.80 km in T = (1.80km * 1000m/1km)/9.33m/s will take 190 seconds.

She needs to lower her head by 190 seconds by 0.5 seconds in order to go more quickly than the age-appropriate speed of 8.5 yards per second.

To know more about distance visit :-

brainly.com/question/29130992

#SPJ1

Use the graph that shows the solution f(x) = g(x)
F(x) = x^2 + 4x +2
G(x) (1/2)^2 + 1
What is the solution to f(x) = G(x)
A -1
B 0
C 2
D 3

Answers

The solution of both the functions, f(x) = g(x) = 2, is option(c).

What is a function?

A function in mathematics from a set X to a set Y allocates exactly one element of Y to each element of X. The sets X and Y are collectively referred to as the function's domain and codomain, respectively. Initially, functions represented the idealised relationship between two changing quantities.

Given two functions,

f(x) = x² + 4x + 2

g(x) = [tex](1/2)^{x} + 1[/tex]

observe the graphs below

We are asked to find the solution of f(x) = g(x)

The solution that satisfies both functions is the intersecting point of both graphs.

From the graph, it is observed as (0,2)

Hence when x =0, the solution of both the functions f(x) = g(x) = 2, which is option(c).

To learn more about functions, follow the link.

https://brainly.com/question/11624077

#SPJ1

Which of the following can you use to justify the statement VWX~AZYX?
1. AA
2.SAS
3.SSS
4. Not similar

Answers

ΔVWX ≅ ΔZYX, to justify the statement SAS property is used.

Correct option is: 3

What is the SAS property in triangle?

Congruent triangles exist if its two sides and also included angles are identical to that of other triangle's two sides and also included angle.

The triangles are considered to be congruent when all three pairs of matching sides are. Side-side-side is the name of this congruence shortcut (SSS). Side-angle-side (SAS) is an alternative simplification if two sets of side as well as the angles between them is known to just be congruent.

When determining if a collection of triangles is congruent, the Side-Angle-Side rule is utilized. According to the SAS rule, two sides and the included angle of one triangle must equal two sides and the included angle of another triangle in order for the two triangles to be considered congruent. An angle produced by two specified sides is called an included angle.

Correct option: 3

To know more about SAS property refer to:

https://brainly.com/question/30326243

#SPJ1

evaluate the integral. 1 (x2 4)e−x dx 0

Answers

After evaluating the integral of equation is ( x ^2+4)×e−x dx

 =ex ^2+4e−dx

There are occasions when it is possible to perform an apparently difficult piece of integration

by first making a substitution. This has the effect of changing the variable and the integrand.

When dealing with definite integrals, the limits of integration can also change. In this unit we

will meet several examples of integrals where it is appropriate to make a substitution.

(x^2 + 4)e−x dx = 0

(x ^2+4)×e−x dx

Multiply the terms

e(x ^2+4)−x dx

Multiply the terms

Evaluate

x dx

Multiply the terms x^ 1+1 d

Add the terms

x ^2d

Multiply the terms dx ^2

e(x ^2+4)−dx ^2

Simplify

e(x ^2 +4)

Apply the distributive property

ex ^2+e×4

Multiply the terms

ex^ 2+4e

ex ^2+4e−dx ^2

After evaluating the integral of equation is(x ^2+4)×e−x dx =ex ^2+4e−dx ^2

To know more about Integration visit brainly.com/question/22008756

#SPJ4

Ainsley works for the owners of a bookstore. Her starting salary is $24,500, and she gets a 3% raise each year.
a. Write an equation in function notation to represent Ainsley's salary as a function of the number of years she has been working at the bookstore.
b. What will Ainsley's salary be when she begins her fourth year working at the bookstore? Show your work.

Answers

The equation in function notation to represent Ainsley's salary is y = $24,500 * (1 + 0.03x) and  Ainsley's salary will be $26,940 when she begins her fourth year working at the bookstore.

What is an equation in function notation?

An equation involving x and y, which is also a function, can be written in the form y = “some expression involving x”; that is, y = f ( x). This last expression is read as “ y equals f of x” and means that y is a function of x.

a. Let y be Ainsley's salary after x years of working at the bookstore.

The equation representing Ainsley's salary as a function of the number of years she has been working at the bookstore is y = $24,500 * (1 + 0.03x).

b. To find Ainsley's salary when she begins her fourth year working at the bookstore, we need to plug in x = 3 into the equation:

y = $24,500 * (1 + 0.03x)

y = $24,500 * (1 + 0.03 * 3)

y = $24,500 * 1.09

y = $26,940.

Hence, The equation in function notation to represent Ainsley's salary is y = $24,500 * (1 + 0.03x) and  Ainsley's salary will be $26,940 when she begins her fourth year working at the bookstore.

To learn more about the equation in function notation visit,

https://brainly.com/question/14305335

#SPJ1

Factorise the following:
2x²-6x

Answers

Answer:

Step-by-step explanation:

3^-1 divided by 3^4 equals

Answers

3^-1 divided by 3^4 equals is  0.00411522633

What are fractions?An element of a whole or, more broadly, any number of equal pieces, is represented by a fraction. When used in conversational English, a fraction indicates the number of components of a particular size, as in one-half, eight-fifths, and three-quarters. There are three main fraction kinds in mathematics. They come in three varieties: proper fractions, incorrect fractions, and mixed fractions. Numerator and denominator terms are known as fractions. We define its types in light of these two words. There are seven different types of fractions: equivalent fractions, like fractions, mixed fractions, appropriate fractions, and fractions with the same numerator.

Thus,

3^-1 divided by 3^4 equals is

0.00411522633

To learn more about fractions refer to:

https://brainly.com/question/78672

#SPJ1

The fraction of exponents  3⁻¹ divided by 3⁴ equals = 243.

What are fractions?

An element of a whole or, more broadly, any number of equal pieces, is represented by a fraction. When used in conversational English, a fraction indicates the number of components of a particular size, as in one-half, eight-fifths, and three-quarters. There are three main fraction kinds in mathematics.

They come in three varieties: proper fractions, incorrect fractions, and mixed fractions. Numerator and denominator terms are known as fractions. We define its types in light of these two words. There are seven different types of fractions: equivalent fractions, like fractions, mixed fractions, appropriate fractions, and fractions with the same numerator.

Thus,

3-1 divided by 3^4 equals is

We know when base are same in division, we can factor the abse and subtract the exponent

[tex]3^{(4 -(-1))}[/tex]

= [tex]3^5[/tex]

= 243

Thus, 3⁻¹divided by 3⁴ equals = 243

To learn more about fractions refer to:

brainly.com/question/78672

#SPJ1

79% of 8400 + 66.66% of 4800 = 120% of 7200+ x% of 4784. what is the value of x?
(a) 33.33 (b) 25 (c) 11.11 (d) 20.13

Answers

The value of x = 25 % (option b) in 79% of 8400 + 66.66% of 4800 = 120% of 7200+ x% of 4784. by converting the percentages.

79% of 8400 = ( 79/100) x 8400

                     = 6636

66.66% of 4800 = (66.66/100)x4800

                      = 3199.68

120% of 7200 = (120/100)x7200

                       = 8640

x% of 4784  = (x/100) x 4784

we are given that, 79% of 8400 + 66.66% of 4800 = 120% of 7200+ x% of 4784. what is the value of x :

therefore, 6636 + 3199.68 = 8646 + (x/100) x 4784

                 (x/100) x 4784 = 6636 + 3199.68 - 8646

                                         = 1189.68

                                (x/100) = 1189.68/4784

                                            = 0.248

                                    x = 0.248 x 100

therefore , the value of x is equals to 24.8 % or 0.248 which is approximated to 25 % that is option (b)

Learn more about the percentage here :

https://brainly.com/question/29306119

#SPJ4

Leander, his brother, and a friend are sharing 36
dollars equally. How much money will each one get? What fractional part of the
$36 did each person get? * Write an equivalent fraction that represent the amount
each person received.

Answers

The amount of money each person gets is $12.

For a total amount of $36, each person gets a fraction of 1/3 of the whole amount.

What is fraction?

In mathematics, a fraction is used to denote a portion or component of the whole. It stands for the proportionate pieces of the whole. Numerator and denominator are the two components that make up a fraction. The numerator is the number at the top, and the denominator is the number at the bottom.

The number of people are = 3

The amount of money to be shred equally is = $36

Let the amount of money each person gets be = x

Then for 3 people the amount will be = 3x.

The formula to find the value of x is -

3x = 36

x = 36/3

x = 12

Therefore, each person get $12.

The fraction that represents the amount will be -

share of each person / total amount

Substitute the value into the expression -

12/36 = 1/3

Therefore, each person shares 1/3 of the money.

To learn more about fraction from the given link

https://brainly.com/question/20323470

#SPJ1

The drama club is selling tickets to their play to raise money for the show's expenses. Each student ticket sells for $7 and each adult ticket sells for $9. There was a total of $543 in revenue from the sale of 67 total tickets. Write a system of equations that could be used to determine the number of student tickets sold and the number of adult tickets sold. Define the variables that you use to write the system.

Answers

The system of equations that can find the number of student tickets sold is:

7x + 9y = 543

x + y = 67

Defining the variables that helped write the system are:

Let x be the number of student tickets sold

Let y be the number of adult tickets sold.

How to come up with the system of equations ?

First, define the variables. In this case, we can say that x will be the number of student tickets while also making y the number of adult tickets.

The first equation would be:

Revenue of student tickets sold + Revenue of adult tickets = Total revenue

7x + 9 y = 543

The second equation is:

Number of student tickets + Number of adult tickets = Number of total tickets

x + y = 67

Find out more on systems of equations at https://brainly.com/question/29177954

#SPJ1

Answer: The answer is 7x + 9y = 543x + y = 67.

Step-by-step explanation: Please give Brainlist.

Hope this helps!!!!

Can anyone solve these equations?

Answers

The equation can be factorized as (x + 4/3) (x + 3/2).

The expression 2x² + bx - 9 will be prime for the the values of b = 18, 12, and -1.

What are Quadratic Expressions?

Quadratic expressions are polynomial expressions of second degree.

The general form of a quadratic expression is ax² + b x + c.

18. The zeroes of the expression ax² + b x + c can be found by,

x = [-b ± √(b² - 4ac)] / 2a

The given expression is 6x² + 17x + 12.

We have to factorize the expression.

x = [-17 ± √(17² - 4×6×12)] / [2 × 6]

  = [-17 ± √(289 - 288)] / 12

  = (-17 ± 1) / 12

x = -16/12 = -4/3 and x = -18/12 = -3/2

The expression can be factorized as (x + 4/3) (x + 3/2).

19. The expression is non factorable if the value of the discriminant is neither zero nor a positive perfect square.

For ax² + b x + c, Discriminant = b² - 4ac

The expression given is 2x² + bx - 9.

Discriminant = b² - (4 × 2 × -9) = b² + 72

When b = 18, b² + 72 = 396, not a perfect square root

When b = 3, b² + 72 = 81, a perfect square root

When b = 12, b² + 72 = 216, not a perfect square root

When b = -3, b² + 72 = 81, a perfect square root

When b = -7, b² + 72 = 121, a perfect square root

When b = -1, b² + 72 = 73, not a perfect square root

When b = 17, b² + 72 = 361, a perfect square root

So when b = 3, -3, -7 and 17, the expression is factorable.

When b = 18, 12, and -1, the expression is prime.

Hence the expression 2x² + bx - 9 is prime when the values of b are  18, 12, and -1.

Learn more about Quadratic Expressions here :

https://brainly.com/question/14680354

#SPJ1

Based on the figure, select all true equations.

Answers

Answer:

B, C, E, F

Step-by-step explanation:

Solve for the missing angle first (which is 42°)

Listing all of the basic trig ratios (sohcahtoa):

sin x = opp/hyp

cos x = adj/hyp

tan = opp/adj

sin 48° = a/c

cos 48° = b/c

tan 48 = a/b

sin 42° = b/c

cos 42° = a/c

tan 42° = b/a

List the members of the set {2< x < 5}​

Answers

Answer:

3 and 4 or {3,4}

Step-by-step explanation:

3 and 4 are the only numbers greater than 2, but less than 5.

What proportion could you use to find the value of x?
A. 3/11=x/11
B. 3/x=x/11
C. 3+11/x=3/x
D. 11/x=x/11-3

Answers

The correct option: B. 3/x=x/11. is the proportion used to determine the the value of x.

Define the term proportion?Relationships among two variables that are proportional occur when their ratios are equal. Another way to consider them is that in a proportionate relationship, each variable is consistently equal to the other's constant value. This "constant of proportionality" is the name of this constant.

For the stated question:

The pair of sides x and 11 : as well as 3 and x are used to find the proportion.

Thus,

3/x = x/11

It is the correct relation to find the value of x.

To know more about the proportion, here

https://brainly.com/question/870035

#SPJ1

how many grams of carbs in an ounce

Answers

One ounce of food contains average  about 28 grams of carbs.

One of the three macronutrients that the body needs for energy, carbohydrates can be found in a wide variety of foods. Sugar, starch, and fiber are the three elements that make up carbohydrates. Weight is measured in ounces, which weigh 28.35 grams. As a result, one ounce of food contains about 28 grams of carbs. Carbohydrates are crucial for supplying the body with the 4 calories per gram of energy it needs to function, fuel physical activity, and help with digestion. Foods like fruits, vegetables, grains, nuts, and dairy products all naturally include ounces of carbs. It is crucial to remember that there are several kinds of carbs, some of which are healthier than others.

Learn more about average here

https://brainly.com/question/24057012

#SPJ4

The complete question is

How many grams of carbs in an ounce of food ?

A Ferris wheel is 45 meters in diameter and boarded from a platform that is 1 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 8 minutes. How many minutes of the ride are spent higher than 35 meters above the ground?

Answers

If A Ferris wheel is 45 meters in diameter and boarded from a platform that is 1 meters above the ground. The number of minutes  of the ride that are spent higher than 35 meters above the ground is: 2minutes.

How to find the number of minutes?

Ferris wheel radius = 45/2

Ferris wheel radius = 22.5 meters

When the Ferris wheel is at the 12 o'clock position, the center of the wheel is at a height of 22.5 + 1 = 23.5 meters above the ground.

When the Ferris wheel is at the 3 o'clock position, the highest point on the wheel is at a height of (22.5 + 1) + (22.5) = 46 meters above the ground.

So the time spent higher than 35 meters is the time spent between 3 o'clock and 12 o'clock positions, which is a quarter of the full revolution time is:

Time spent higher than 35 meters = 8/4

Time spent higher than 35 meters = 2 minutes

Therefore the time spent higher than 35 meters is 2 minutes.

Learn more about time here:https://brainly.com/question/26046491

#SPJ1

Other Questions
Select the correct text in the passage. Which detail most refines the idea that Sandra Cisneros embraces that she can tell more than just her story? (8) When I wrote Mango Sreet, in the beginning it was as a memoir with the intent of writing something that was just mine, that no one couid tel me was wrong, Thars how it began. (9) By the time I finished it, I was working in a school in a Latino community in Chicagoa very poor, alternative high school. I started writing stories of my students lives and weaving it into this neighborhood from my past. (10) During that period, when I had my face in the dust and didn't know what to do in this 50-student school with no money and minimum wage --chalk I had to bring to class, girls and boys whose lives were so difficult, lives that no head of state could ever imagine- was really frustrated as a high school teacher as to how to save their lives. The only thing I could do was tO write about them and try to find some consolation before sleeping. These stories were written from that very helpless state I think when we're most face-in-the-dust impotent, and we put ourselves at service to others, that's when we really are channeled to light. I think thar's wy the book is a success. I wasn't thinking of the reader, or that the book is going to be published. None of that. I think the less you can think about the reader, and the more you work on behalf of others, I really believe that it puts you in a state of grace. evaluate the probability that the fuel tank (f) is empty, given also the observation that the battery is flat. which probability is lower? comment on the results. 7. is sca1 considered to be caused by a loss of function of the protein affected, or is it thought to be due to another mechanism? Which NIMS-ICS section is responsible for ensuring that all transportation and facilities needs are met at an incident?Select one:a.Command Sectionb.Logistics Sectionc.Operations Sectiond.Planning Section Read the excerpt from "my heart is bursting." i love to roam over the prairies. there i feel free and happy, but when we settle down we grow pale and die. which of set'tainte (satanta)s central ideas do these details most contribute to? a. white settlers and indigenous peoples must live in peace. b. united states soldiers threaten the kiowa tribes way of life. c. it is vital to the kiowa tribe that they maintain their lifestyle. d. the kiowa tribe is going to stubbornly remain on their land. Dot sells tshirts($3) and shorts($4). In April, total sales were $484. People bought 6 times as many tshirts as shorts. Please help me I'm desperate what are two benefits of 'big room training'? (choose two.) 1 make sentences using the positive (4), negative (-), or question form (?) of have to. i what time / you / arrive / at the airport (?) 2 mysister / study / english / in school ( ) how to write cube root on mobius should you stop hugging your dog? in 250 photos of people hugging their dogs, 82% of the dogs showed signs of stress (coren, 2016). which question would best help you evaluate the validity of this argument? 6] A ship sails 70 km on a bearing of 38 and then changes course and sails 40 km ona bearing of 150 By making a scale diagram find: -a) The final distance of the port from the ship.b) The final bearing of the port from the ship. normal functions of the kidney include all of the following except: a. regulating electrolyte balance b. elimination of nitrogenous wastes c. regulating body hydration d. elimination of serum proteins When demand shocks lead to recessions, it is mainly due to:price inflexibility. (psychology question)What is decay? Decay is the quantity that can be stored. Decay is a measure of time. Decay is a measure of the quality of memories. Decay is to diminish or break down. Why will this declaration not work? animation: linear 5s 3 alternate-reverse; There needs to be an 's' after the number '3' There is no setting called 'alternate-reverse The animation-timing-function property has to follow 5s The animation name property is missing the overall attractiveness of a foreign market depends on the risks and rewards of conducting business in the country of interest. inadequate protection of contracts and intellectual property are examples of risk. true or false which of the following is true with regard to culture? group of answer choices it captures how the members of the society live. it is absolute. it does not define the collective behavior of each society. it is inherited. How does molecular biology provide evidence for evolution? Simplify the expression (r 6)(r 2) + (r + 4)(r 9)