Let x be the grade of the last exam, then the average is:
[tex]\frac{71+76+88+92+x}{5}=\frac{x+327}{5}[/tex]now, to get a B we need this to be greater or equal than 80 and less than 90, that is:
[tex]80\leq\frac{x+327}{5}<90[/tex]Solving for x we have:
[tex]\begin{gathered} 80\leq\frac{x+327}{5}<90 \\ 5\cdot80\leq x+327<5\cdot90 \\ 400\leq x+327<450 \\ 400-327\leq x<450-327 \\ 73\leq x<123 \end{gathered}[/tex]Therefore the range of grades on the fifth exam that results in earnings a B is
[tex]73\leq x<123[/tex]If the highest grade is 100, then
[tex]73\leq x\leq100[/tex]Answer:
73-100
Step-by-step explanation:
Steve has a pretty lenient grading system! (Usually 85-93 is a B.)
He needs at LEAST an 80 , so the average of his five scores must meet this
(71+76+88+92+x) / 5 = 80
solve for x = 73
If he scores less than a 90 average , he will still get a B
(71+ 76 + 88+92 +x) / 5 < 90 shows x < 123 ( which he cannot score)
so the range of scores on fifth test to get a final grade B is 73 - 100 .
Use the graph of f to describe the transformation that yields the graph of g. f(x)=3^xg(x) = −3^x−2
Solution:
Given the functions:
[tex]\begin{gathered} f(x)=3^x \\ g(x)=-3^{x-2} \end{gathered}[/tex]The graph of f(x) is as shown below:
The graph of g(x) is as shown below:
Description:
In the above graph, we observe that in the transformation, the f(x) plot is reflected across the x-axis and shifted downwards by 2 units to obtain the g(x) plot.
Which transformations will preserve the parallel and perpendicular lines in the rectangle?
Explanations:
• Take note that the sides of a rectangle are parallel
• All 4 angles are 90 degrees, when they intercept they form a perpendicular line .
• The reflection, rotation and the transformation, will still maintain and preserve the properties of rectangle,
,• opposite side are still going to be parallel and congruent,
90 degrees angles will still remain the same .
This shows that the properties of a rectangle are maintained
an airplane travels 3 miles in 24 seconds. At this rate, how many miles can the airplane travel per second
Help me out here please
To find the scale factor, we have to divide two corresponding sides
[tex]\frac{DE}{AB}[/tex]Using the given information, we have
[tex]\frac{20}{10}=2[/tex]Hence, the scale factor is 2.Pentagon ZEBRA is similar to pentagon
LIONS. What is the length of RA in feet?
E
22 ft
13 ft
Z
18 ft
R
20 ft
A
10.4 ft
I
14.4 ft
17.6 ft
N 12 ft S
L
16 ft
After performing some mathematical operations, the length of RA is 15 feet.
What are mathematical operations?A function in mathematics known as an operation is one that transforms zero or more input values into a clearly defined output value. The operation's complexity is determined by its operand count. The four mathematical operations are functions that take numerical inputs (i.e., inputs) and turn them into numerical outputs (i.e., another number). These are multiplication, division, subtraction, and addition.So, the length of RA is:
As both the pentagons are similar, then:
EB/IO = 13/10.4 = 1.25BR/ON = 18/14.4 = 1.25ZA/LS = 20.16 = 1.25EZ/IL = 22/17.6 = 1.25Similarly,
RA/NS = RA/12 = 1.25RA = 12 × 1.25 = 15 ftTherefore, after performing some mathematical operations, the length of RA is 15 feet.
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What is the solution of the inequality 7(x+4) less than 2(-5)+3(x+9)?
Answer:
The solution is x < - 11/4.
Step-by-step explanation:
In inequality notation, 7(x+4) less than 2(-5)+3(x+9) simply means:
7(x+4) < 2(-5)+3(x+9) ⇒7x + 28 < - 10 +3x +27
To collect like terms, subtract 3x and 28 from both sides of the inequality, thus:
7x - 3x < - 10 + 27 - 28 ⇒ 4x < -11 ⇒ x < -11/4 [by dividing both sides of the inequality by 4]
Therefore, the solution is x < - 11/4.
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CHOOSE ALL ANSWERS THAT ARE CORRECT.The lengths of two sides of a triangle are 55 and 20.Select the possible lengths of the third side.-30-14-35-45-72-60-75
Given:
The lengths of two sides of a triangle are 55 and 20.
Required:
To find the possible lengths of the third side.
Explanation:
So, if the third side is x cm, then
[tex]55+20=75[/tex]So, we got
[tex]x<75[/tex]Now
[tex]\begin{gathered} x+20>55 \\ x>55-20 \\ x>35 \end{gathered}[/tex]Hence the conclusion is the value of x lies between 35 and 75.
Therefore, the possible third sides are 45, 72 and 60.
Final Answer:
The possible third sides are 45, 72 and 60.
help help help pleaseeeee!!!!!!
The domain of the relation is [1,6]. The domain can be written in the roster form method like {x I x ∈ {1,....,6}} The range of the function is [1,2].
As we can see that the range of values in x-axis is from [1,6]. Hence, it is the domain of the relation.
Also, he range of values in y-axis is from [1,2]. Hence, it is the range of the relation.
Domain of a relation
The domain or set of departure of a function is the set into which all of the input of the function is constrained to fall.
Range of a relation
The set of the second elements of all the ordered pairs of a relation is the range of a relation.
Set roster form
The elements (or members) of a set are listed in a row inside the curly brackets.
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The product of the polynomials (3x + 2) and (-x^3-3) is ______.When this product is multiplied by (3 + x), the coefficient of x^4 in the result is______.
The product of the polynomials (3x+2) and (-x^3-3) is:
(3x+2)*(-x^3-3) = (3x)*(-x^3) + (3x)*(-3) + 2*(-x^3) + 2*(-3) = -3x^4 - 2x^3 -9x - 6
Multiplying it by (3 + x), we got:
(3 + x)*(-3x^4 - 2x^3 -9x - 6) = 3*(-3x^4) + 3(-2x^3) + 3*(-9x) +3*(-6) + x*(-3x^4) + x*(-2x^3) + x*(-9x) + x*(-6) = -3x^5 -11x^4 -6x^3 -9x^2 - 33x - 18
Therefore, the coefficient of x^4 is -11.
fill in the blanks so the left side is a perfect square trinomial
We need to complete the perfect square. A perfect square has the following form:
[tex]a^2\cdot x^2+2\cdot a\cdot b\cdot x+b^2=(a\cdot x+b)^2[/tex]In our case we have:
[tex]x^2-8x+\cdots[/tex]We can immediately deterine the value of "a", which is the root of number multiplying x², since this number is 1, then:
[tex]a=1[/tex]This also means we can find "b", because the second term is equal to the product of 2, a, and b. So we have:
[tex]\begin{gathered} b=\frac{8}{2} \\ b=4 \end{gathered}[/tex]With this we can determine the blank, because it is b². So we have:
[tex]\begin{gathered} x^2-8x+4^2 \\ x^2-8x+16=(x-4)^2 \end{gathered}[/tex]The first missing space is 16 and the second is 4.
simplifying like terms and distributive property;2(m + 1) + 5m
2(m + 1) + 5m
step 1
Apply distributive property
2*(m)+2*(1)+5m
2m+2+5m
Combine like terms
7m+2Evaluate o = √npq, where q=1 - p, for n = 80 and p = 0.4.
The formula for the variance of the binomial distribution is o = √npq
Equating the value is the equation
o = √npq,
[tex]o = \sqrt{80\times1\times\0.4}[/tex]
o = 5.6568
What is binomial distribution?
The binomial distribution is defined as the number of trials or observations when each trial has the same probability of reaching a certain value. The binomial distribution determines the probability of observing a certain number of successful outcomes for a given number of trials.
The binomial distribution model allows us to calculate the probability of observing a certain number of "successes" if a process is repeated a certain number of times (eg, in a patient population) and the result for a given patient is either successful. or failure.
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mikes's fittness center charges $30 per month for a membership. all day fitness club charges $22 per month plus an $80 initiation fee for a membership. after how many months will the total amount paid to the two fitness clubs be the same
Answer: 7 months
Step-by-step explanation: by 7 months you would have paid both memberships $300
it cost $6 per hour to water the grass. how much will it cost to water the grass for 7/3 hours
start by writing a relation
[tex]\begin{gathered} 1hour\longrightarrow\text{ \$6} \\ \frac{7}{3}hour\longrightarrow x \end{gathered}[/tex]find x using the relationship
[tex]x=(\frac{7}{3}\text{hour)}\cdot\frac{\text{ \$6}}{1\text{hour}}[/tex][tex]x=\text{ \$14}[/tex]Josh works as a tutor for $15 an hour and as a waiter for $13 an hour. This month, he worked a combined total of 95 hours at his two jobs.
Lett be the number of hours Josh worked as a tutor this month. Write an expression for the combined total dollar amount he earned this month.
total earned (in dollars)
An expression for the combined total dollar Josh earned this month is X = 15t + 13(95 - t).
What is a mathematical expression?A mathematical expression is a statement using a combination of numbers, variables, and mathematical operands.
Mathematical expressions may also use the equal symbol (=) to show that the two expressions are equal. Sometimes, the inequality signs are used when two expressions are not equivalent.
The pay rate per hour as a tutor = $15
The pay rate per hour as a waiter = $13
The combined total hours worked for the month = 95 hours
Let t = the number of hours worked as a tutor
Let X = Josh's total dollars earned for the month.
Josh's total earnings as a tutor for the month, A = 15t
Josh's total earnings as a waiter for the month, B = 13(95 - t)
The combined total dollar Josh earned this month, X = A + B
X = 15t+ 13(95 - t).
Thus, the total earnings by Josh for this month can be expressed as X = 15t+ 13(95 - t).
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can you please help me with this
The equation of the line that passes through the points (-2,4) and (-4,3) is y = (1/2)x + 5.
We know the slope intercept form of a line is given by:-
y = mx + c
Where,
m represents the slope of the line,
c represents the y-intercept, and
(x,y) represents the ordered pair of each point on the line
We know that,
m = (3-4)/(-4-(-2)) = -1/-2 = 1/2
We can write,
4 = (1/2)(-2) + c
4 = -1 + c
4 + 1 = c
c = 5
Hence, the equation of the line is :-
y = (1/2)x + 5
The graph of the equation is attached below.
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He gives Ms. Danso 0.6 of the tray of brownies and tells her that it contains 330 grams of sugar. How many grams of sugar did Mr. Butcher use for the whole tray?
We can form an equation to solve this
What is an equation?
A mathematical equation is a formula that uses the equals sign to represent the equality of two expressions. The definitions of the word equation and its cognates in various languages might vary slightly. For instance, in French, an equation is defined as having one or more variables, but in English, an equation is any well-formed formula that consists of two expressions linked by the equals sign. An equation can be compared to a scale on which objects are weighed. More broadly, if the identical operation is carried out on both sides of an equation, the equation remains in balance. Algebra focuses on two primary families of equations: the specific case of linear equations and polynomial equations.
We form an equation as 0.6x=330
The equation can be solved as
0.6x = 330
or, x = 330/0.6 = 550 grams
Hence Mr. Butcher used = 550 - 330 = 220grams of sugar
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What is the point-slope from of the equation of the line that passes through the point( -1, -4) and has a slope of 3?
The equation of the line in point-slope form passing through ( - 1, - 4 ) and slope 3 is y + 4 = 1( x + 1 ).
The set of points that make up a line in a coordinate system is represented algebraically by a line's equation. An equation of a line is an algebraic expression that represents the many points that together make up a line in the coordinate axis as a set of variables, x, and y.
The point-slope form of an equation of the line is given as:
y - y₁ = m( x - x₁ ) where m is the slope and ( x₁, y₁ ) is the point on the line.
Now, the equation of line passes through ( - 1, - 4 ) and m = 1
Then,
y - y₁ = m( x - x₁ )
y - ( - 4 ) = 1( x - ( - 1 ) )
y + 4 = x + 1
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Seth earns $25 a day and $3 for each ticket he sells at the local theatre. Write and solve aninequality that can be used to find how many tickets he must sell in a day to earn at least $115.Write an inequality. *
The problem says Seth earns $25 a day and $3 for each ticket he sells.
Let's for each ticket he sells.
Let's
Find the distance between the points (0, 6) and (3, 2).
Write your answer as a whole number or a fully simplified radical expression. Do not round.
units
Answer:
5.
Step-by-step explanation:
1. the formula of the required distance:
[tex]d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2} ;[/tex]
2. according to the formula above:
[tex]d=\sqrt{3^2+4^2}=5.[/tex]
NOV 16, 7:18.A What is the image of the point (-3,-5) after a rotation of 180° counterclockwise about the origin?
when we rotate a point 180°, we have to change the sign in every coordinate. Therefore we get that the new point is (3,5)
Select all of the angle pairs that are supplementary when two parallel lines are intersected by a transversal.
Linear pair
Vertical angles
Corresponding angles
Alternate interior angles
Alternate exterior angles
Consecutive interior angles
Consecutive exterior angles
write the given interval notaion (-12,8] into set-builder notation
If we plot the values of x representing the given interval on the number line, the least value would be - 12. It would be on the left and also non inclusive. The greatest value of x would be 8 on the right and inclusive. By writing it in set builder notation, it is expressed as shown in the attached photo
in HJK, P is the centroid. If HM=39 find PM
If triangle HJK has a centroid P then we know that the side HP will be the double of PM so we can made an equation for HM
[tex]\begin{gathered} HM=HP+PM \\ HM=2PM+PM \\ HM=3PM \end{gathered}[/tex]Now we can replace the value of HM and solve for PM so:
[tex]\begin{gathered} \frac{39}{3}=PM \\ 13=PM \end{gathered}[/tex]There are 50 people at the movies. Four times
as many people are seated than are standing
in line. How many people are seated?
40 people are seated. (Solved using the equation 4x + x = 50)
What is an equation?
An equation can be compared to a scale on which objects are weighed. When the two pans are filled with the same amount of anything (like grain), the scale will balance and the weights will be considered equal. To maintain the scale in balance, if any grain is taken out of one of the balance's pans, an equal amount must be taken out of the other pan. More broadly, if the identical operation is carried out on both sides of an equation, the equation remains in balance. Equations involving one or more functions and their derivatives are known as differential equations. By identifying a derivative-free formulation for the function, they may be resolved. Processes are modeled using differential equations.
The equation below is formed according to the question
4x + x = 50
or, 5x = 50
or, x = 50/5 = 10
Hence, no. of people seated = 4x10 = 40
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You deposit $5000 in a savings account that earns 1.5% interest compounded daily. After 1 yeat, you deposit an additional $5000 into the same savings account, but the interest is now 1.75% compounded daily. What is the value of the account after the second year?
The value of the amount after the second year is $10163.817.
In order to compute compound interest, we multiply the principle of the original loan by the annual interest rate multiplied by the number of compound periods minus one. Then we are left with the principal amount of the loan plus compound interest.
Amount after Compound Interest [tex]A = P(1+\frac{r}{nt} )^{nt}[/tex] where A is the amount, P is the Principle value, r is the rate of interest, n is the number of times it is compounded daily, and t is the time.
Given Information :
For 1st year, Principal Amount (P) = $5000
Interest (r) = 1.5 %
Time = 1 year
The amount is calculated compounded daily,
So, Calculating the amount after 1 year,
[tex]A = P( 1+\frac{r}{nt}) ^{nt} \\A = 5000(1+\frac{1.5}{365*100}) ^{365*1} \\A = 5000(1+0.00004109)^{365} \\A = 5000*1.015\\A =5075.55[/tex]
For 2nd Year, Principal Amount= (P) $5000
Rate of Interest (r) = 1.75%
Time (t) = 1 year
The amount is calculated compounded daily,
So, Calculating the amount after 1 year,
[tex]A =P(1+\frac{r}{nt}) ^{nt\\}\\A= 5000(1+\frac{1.75}{365*100}) ^{365*1} \\ A = 5000(1.00004795)^{365} \\A =5000*1.077\\A =5088.26[/tex]
Now, the value of the amount after the second year = $5075.55 +$5088.26 =$10163.817.
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What is multiplied to get -50 but also adds to get 5
Explanation:
To determine the numbers, we need to find factors of -50:
We only have one of the numbers with negative because we are finding factor of a negative number.
Multiplication of opposite signs give negative number.
[tex]\begin{gathered} -1\text{ }\times\text{ 50} \\ -2\text{ }\times\text{ 25} \\ -5\text{ }\times\text{ 10} \\ -10\text{ }\times\text{ 5} \\ -25\text{ }\times\text{ 2} \\ -50\text{ }\times1 \end{gathered}[/tex]From the factors listed above, we find the two numbers sum up to give -50:
[tex]\begin{gathered} -1\text{ + 50 = 49} \\ -2\text{ + 25 = 23} \\ -5\text{ + 10 = 5} \\ -10\text{ + 5 = - 5} \\ -25\text{ + 2 = -23} \\ -50\text{ + 1 = -49} \end{gathered}[/tex]Write the equation of the line in slopeintercept form that passes through thepoints (-3, 1) and (2,6).
Answer:
[tex]y=x+4[/tex]Slope Intercept Form
y = mx + b
Where
m is slope
b is y- intercept (y axis cutting point)
Now,
Slope is change in y's over change in x's:
[6-1]/[2--3] = 5/5 = 1
So, we have:
y = 1x + b
y = x +b
We can just plug in a point (let it be (2,6) ) in x and y and solve for b:
y = x + b
6 = 2 + b
b = 6-2
b = 4
Final equation:
[tex]y=x+4[/tex]a committee of five congressmen will be selected from a group of seven democrats and four replublicans. find the number or ways obtaining exactly one republican
Combinations are a method of calculating the total outcomes of an event where the order of the outcomes is irrelevant. We will use the formula nCr = n! / r! * (n - r)! to calculate combinations.
How do you calculate combinations?Combinations are a method of calculating the total outcomes of an event where the order of the outcomes is irrelevant. We will use the formula nCr = n! / r! * (n - r)! to calculate combinations, where n represents the total number of items and r represents the number of items chosen at a time.Combinations are used in probability theory and other areas of mathematics to describe a sequence of outcomes where the order is irrelevant. When ordering a pizza, for example, it makes no difference whether you order it with ham, mushrooms, and olives or olives, mushrooms, and ham. You're going to get the same pizza!They can select one republican from the four republican by 4 ways, and than select the remaining 4 members
from the 7 republicans by [tex]C^{4} _{7}[/tex]= 7 x5 = 35 ways.
In all, 4 × 35= 140 selections are possible.
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Jake, Jonathan and Joshua each have a subscription on different movie websites. On the website Jake buys from, there is no flat fee to use the website but each time you buy a movie it is 50 cents. On Joshua’s website, there is a flat fee of $5 to use the site and each time you buy a movie you must pay 50 cents. On Jonathan’s website, there is a flat fee of $8 to use the site and each time you buy a movie it is 20 cents. Based off the data, how many movies would each person buy to pay the same amount of money from each website? Write a system of linear equations and graph the problem.
Jake
There is no flat fee = $0
To buy a movie = 50 cents = $0.50
Joshua
Flat fee = $5
To buy a movie = 50 cents = $0.50
Jonathan
Flat fee = $8
To buy a movie = 20 cents = $0.20
Then, we have the following expressions:
[tex]\begin{gathered} 0+0.50x \\ 5+0.50z \\ 8+0.20t \end{gathered}[/tex]Next, to pay the same amount of money from each website. This is:
Let y = number of movies
[tex]0.50x=5+0.50z=8+0.20t=y[/tex]So, solve the system:
[tex]\begin{gathered} y=0.50x \\ y=5+0.50z \\ y=8+0.20t \end{gathered}[/tex]