Answers
Related Questions
If n=12, ¯x (x-bar)=34, and s=19, construct a confidence interval at a 90% confidence level. Assume the data came from a normally distributed population.Give your answers to one decimal place. < μ <
Answers
n=12
s=19
X=34
ConfLevel=90%
A confidence level of 90%
represent a Z statistical of 1.645
the Confidence interval is given by
[tex]X\pm Z*\frac{s}{\sqrt{n}}[/tex]then
[tex]34\pm1.645*\frac{19}{\sqrt{12}}[/tex][tex]34\pm9.02254[/tex]then the interval is
[tex]25.0\leq u\leq43.0[/tex]is 3 a factor of 12
Answers
Answer:YES
Step-by-step explanation:
Answer:
Yes
Step-by-step explanation: the factors of 12 are 1,2,3,4,6 and 12
Solve for the system of equations by graphing. find the point of intersection.y = x+4y = -x+5 See picture of problems I need help with
Answers
Step 1
Given;
Step 2
We will graph for the solution using the points below.
[tex]\begin{gathered} For\text{ y=x+4} \\ (-4,0),(0.5,4.5)\text{ and \lparen0,4\rparen} \\ For\text{ y=-x+5} \\ (0,5),(0.5,4.5)\text{ and \lparen5,0\rparen} \end{gathered}[/tex]Answer; The solution and point of intersection is
[tex](0.5,4.5)[/tex]Question number 12. Find the area of each sector.DO NOT ROUND.
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For solving this problem we need to remember the generic formula. If we have a circle sector with angle x (in degrees),
[tex]\text{Area of S}=(radius)^2\cdot\pi\cdot(\frac{angle}{360})[/tex]The trick of this exercise is that our angle is expressed in degrees (°). Be careful!
Let's compute the solution:
[tex]Area\text{ of our sector }=(16\cdot\pi)^2\cdot\pi\cdot(\frac{240}{360})=16^2\cdot\pi^2\cdot\pi\cdot(\frac{2}{3})=\pi^3\cdot(\frac{512}{3})=\frac{512}{3}\cdot\pi^3[/tex]That's the final answer.
Comment: For every exercise of this kind you only need to apply the formula I provided you above. If the angle is in radians, the formula is
[tex]\text{ Area of sector }=\frac{1}{2}(radius)^2\cdot(angle)[/tex]Classic Car Monthly charges $49 for a 3-line classified ad. Each additional line costs $9.50. For an extra $30, a seller can include a photo. How much would a 5-line ad with a photo cost?
Answers
Answer:
$98
Step-by-step explanation:
Classic Car Monthly charges $49 for a 3-line classified ad. Each additional line costs $9.50. For an extra $30, a seller can include a photo. How much would a 5-line ad with a photo cost?
base,3-line cost: $49
additional cost for 2-lines: 2* 9.50 = $19
photo cost: $30
cost: 49 + 19 + 30 = $98
[This answer does not take into account any sales tax]
Predict the length of the spring when 5.0 kg is attatched
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step 1
Graph the given points
(0, 5)
(0.5,5.7)
(1, 6.5)
(1.5,6.7)
(2,8.5)
(2.5,9.5)
using a graphing tool
see the attached figure
Find out the equation of the line that best represents this situation
we take the points
(0,5.0) and (2, 8.5)
Find out the slope
m=(8.5-5.0)/(2-0)
m=3.5/2
m=1.75
the equation of the line is
y=1.75x+5
therefore
For x=5.0 kg
substitute
y=1.75(5.0)+5
y=13.75 cmBased on a survey, assume that 47% of consumers are comfortable having drones deliver their purchases. Suppose
that we want to find the probability that when six consumers are randomly selected, exactly four of them are
comfortable with delivery by drones. Identify the values of n, x, p, and q.
The value of n is
(Type an integer or a decimal. Do not round.)
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The values of n, x, p, and q are as follows: P = 0.47 q= 1-p=1-0.47=0.53 X=2 .
What is probability ?
Simply put, probability is the likelihood that something will occur. When we don't know how an event will turn out, we can discuss the likelihood or likelihood of several outcomes. Statistics is the study of events that follow a probability distribution.
How is probability determined?
The probability is computed by dividing the total number of possible outcomes by the number of possible ways the event could occur. Probability and odds are two distinct ideas. Odds are calculated by dividing the likelihood of an event by the likelihood that it won't.
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Which of the following is an irrational number?A. VoB. 73C. 1.36D. -0.19
Answers
We have to identify the irrational number.
An irrational number is a number that can not be expressed as a fraction.
The first option is the square root of 0 which is equal to 0. It is an integer so it can be expressed as a fraction.
Then, it is not an irrational number.
The second option is the square root of 3. This does not have a solution that can be expressed as a fraction or a number with a finite number of decimals.
Then, it can be considered an irrational number.
The third option is a periodic decimal. They can be expressed as fractions so they are not irrational numbers.
the fourth option is a negative decimal number, which can be expressed as decimal, like -19/100. Then, it is not an irrational number.
Answer: the only irrational number is √3 [Option B]
PLEASE WILL GIVE BRAINIEST IF RIGHT THIS IS DUE TODAY PLEASE PLEASE
Can a triangle be formed with side lengths 15, 7, and 6? Explain.
No, because 7 + 6 < 15
No, because 6 + 7 > 15
Yes, because 15 + 7 > 6
Yes, because 15 + 6 < 7
Answers
Answer:
no because 7+6<15
Step-by-step explanation:
Answer:the first one a
Step-by-step explanation:
Which cube is a unit cube?
Responses
Answers
Answer:
A unit cube is a cube whose each side is 1 unit long
Step-by-step explanation:
Examples: a cube whose each side is 1cm or each side is 1 in etc
James has already saved $68 for the $200 video game system.
If he earns $5.50 per hour in his job, how many hours does he need to work to earn the
remainder of the money he needs to buy the video game system?
Answers
Answer: 24 hours
Step-by-step explanation:
First, we will find what he needs to make still.
$200 - $68 = $132
Next, we will divide by $5.50 to find the hours needed since he makes $5.50 per hour.
$132 / $5.50 = 24 hours
Find and solve a and b then verify the function
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Hello!
We have the function f(x) = 3x.
The first step is to calculate the inverse function of f(x):First, let's replace where's f(x) by y:
f(x) = 3x
y = 3x
Now, let's swap the values of x and y:
y = 3x
x = 3y
Now we have to solve it to obtain y:
3y = x
y = x/3
So, we will have:
[tex]f(x)^{-1}=\frac{x}{3}[/tex]B. Reasoning:[tex]\begin{gathered} f(f^{-1}(x))=(3(\frac{x}{3})=x \\ \\ f^{-1}(f(x))=\frac{3x}{3}=x \end{gathered}[/tex]Image with the reasoning:
So, these equations are correct.
As it has no restrictions, this function is valid for all values of x.
Right answer: alternative A.
Obs: You'll have to type in the first box: x/3.
(2x + 15) Find the value of x? in the triangle
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The given triangle is a right angle triangle. This means that one of the angles is 90 degrees. Recall, the sum of the angles in a triangle is 180 degrees. This means that
2x + 15 + x + 90 = 180
2x + x + 15 + 90 = 180
3x + 105 = 180
3x = 180 - 105
3x = 75
x = 75/3
x = 25
Match the parts of the given Polynomial Card: then stack the unused cards together under the polynomial card.
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EXPLANATIO:
Given;
We are given the following polynomial expression;
[tex]-13x-12x^2+97[/tex]Requred;
We are required to match the parts of the given polynomial.
Solution;
A polynomial expressed in standard form is written as shown below;
[tex]-12x^2-13x+97[/tex]The different parts are indicated as follows
[tex]\begin{gathered} Leading\text{ }coefficient=-12 \\ Constant=97 \\ Degree=2 \\ Variable=x \\ Coefficient=-13 \end{gathered}[/tex]Btw the explanation is in words (example: because ? And ? are alternate interior angles, ? Is congruent to ?)
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We know that ∠1 ≅ ∠4
As you determined ∠2 is the supplement of ∠1 and ∠3 is the supplement of ∠4, since ∠1 and ∠4 are equal, you can conclude that ∠2 and ∠3 are also equal.
Point R is the midpoint of XY, which indicates that it divides the line into two equal segments XR and RY.
Segment XR is formed by segments XP and PR, following the segment addition postulate you can determine that:
[tex]XR=XP+PR[/tex]Segment RY is formed by segments RT and TY, so that:
[tex]RY=RT+TY[/tex]Following the substitution postulate, if XR and RY are equal, then:
[tex]XP+PR=RT+TY[/tex]We know that XP ≅ TY, sp they can be simplified from the sums and we get that:
[tex]PR=RT[/tex]Finally, ∠QRP and ∠SRT are at opposite sides of the X shape formed by the intersection of lines QS and PT, they share a vertex at point R. These angles are vertically opposite angles and therefore congruent, so that:
[tex]\angle\text{QRP}\cong\angle SRT[/tex]You can conclude that ΔPQR and ΔTSR are congruent by the Angle-Side-Angle postulate.
x2 + 2x - 1 = 0 solve for x
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Answer:
Ohio state university football roster
The diameter of a circle is 10 yards. Finthe approximate circumference of thecircle, using 3.14 for PI.
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The circumference is defined by the formula below.
[tex]C=\pi d[/tex]Where d is the diameter.
Let's replace the diameter and pi.
[tex]C=3.14\cdot10=31.4yd[/tex]Therefore, the circumference is 31.4 yards.1. Charlene wants to center a rectangular pool in her backyard so that the edges of the pool are an equal distance from the edges of the yard on all sides. The yard currently measures 60 m by 50 m. She wants to use ½ of the area of the yard for the pool. Create an equation for the pool’s dimensions and solve for the distance the pool is from the edge of the yard. Round your final answer to the nearest tenth of a meter.
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First, we have to calculate the length of the sides of the pool, we are told that the scale factor of the backyard to the pool size equals 1/2, then we can find the length of the sides of the pool by multiplying the lengths of the sides of the backyard by 1/2, like this:
length of the pool = length of the yard * 1/2
width of the pool = width of the yard * 1/2
By replacing the 60 m for the length of the yard and 50 m for the width, we get:
length of the pool = 60 * 1/2 = 30
width of the pool = 50 * 1/2 = 25
Let's call x1 to the distance from the base of the pool to the bottom side of the yard and x2 to the distance from the top side of the pool to the top side of the yard, then we can formulate the following equation:
width of the yard = width of the pool + x1 + x2
Since we want the edges to be at an equal distance, x1 and x2 are the same, then we can rewrite them as x:
width of the yard = width of the pool + x + x
width of the yard = width of the pool + 2x
Replacing the known values:
60 = 30 + 2x
From this equation, we can solve for x to get:
60 - 30 = 30 - 30 + 2x
30 = 2x
30/2 = 2x/2
15 = x
x = 15
Now, let's call y1 to the distance from the right side of the corresponding side of the yard and y2 to the distance from the left side of the pool to the left side of the yard, with this, we can formulate the following equation:
length of the yard = length of the pool + y1 + y2
Since we want the edges to be at an equal distance, y1 and y2 are the same, then we can rewrite them as y:
length of the yard = length of the pool + y + y
length of the yard = length of the pool + 2y
Replacing the known values:
50 = 25 + 2y
50 - 25 = 25 - 25 + 2y
25 = 2y
25/2 = 2y/2
12.5 = y
y = 12.5
Now, we know that the pool must be at a distance of 15 m from the horizontal sides of the pool to the horizontal sides of the yard and that it must be at a distance of 12.5 m from the vertical sides of the pool to the vertical sides of the yards.
Here is a figure that depicts the results:
Find the y-intercept of the following line. y=14/17 x+14
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The y-intercept of the line y = 14 / 17 x + 14 is 14.
How to find the y-intercept of a line?The equation of a line can be represented in different form such as slope intercept form, point slope form, standard form and general form.
Therefore, let's represent it in slope intercept form.
y = mx + b
where
m = slopeb = y-interceptTherefore, using the equation of a line in slope intercept form, the y-intercept of the equation y = 14 / 17 x + 14 is 14.
The y-intercept of a line is the value of y when x = 0.
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? QuestionType the correct answer in each box.АаFind the solution for this system of equations.:))2x + 4y = 8x = 3y - 6Holax=y =
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The solution for the system of equations is:
x = 0
y = 2
Explanation:Given the pair of equations:
2x + 4y = 8 ........................................................(1)
x = 3y - 6 ............................................................(2)
Substitute the expression of x in (2) into (1)
2(3y - 6) + 4y = 8
6y - 12 + 4y = 8
6y + 4y = 8 + 12
10y = 20
y = 20/10 = 2 ......................................................(3)
Substitute the value of y in (3) into (2)
x = 3(2) - 6
= 6 - 6
= 0
Therefore,
x = 0, and y = 2
answers for the homework
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The indefinite integral of ∫(2ti+j+8k)dt is t²i +tj+8tk+c.
Given the expression is ∫(2ti+j+8k)dt
The indefinite integrals, also known as the derivatives of functions, are integrals that can be computed using the process of differentiation in reverse.
Further approaches for resolving indefinite integrals include integration by parts, substitution, integration of partial fractions, and integration of inverse trigonometric functions.
now, ∫(2ti+j+8k)dt
= 2t²/2 i + tj +8tk
= t²i +tj+8tk+c
hence we get the indefinite integral as t²i +tj+8tk+c
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Paulina’s income from a job that pays her a fixed amount per hour is shown in the graph. Use the graph to find the total income earned for working four 8-hour days all at the standard rate.
Answers
Solution
We need to find the equation of an income y at any time x
Using two-point formula
[tex]\frac{y-y_1}{x-x_1}=\frac{y_2-y_1}{x_2-x_1}[/tex]At points (1, 10) and (6, 60)
[tex]\begin{gathered} \Rightarrow\frac{y-10}{x-1}=\frac{60-10}{6-1}=\frac{50}{5}=10 \\ \\ \Rightarrow\frac{y-10}{x-1}=10 \\ \\ \Rightarrow y-10=10x-10 \\ \\ \Rightarrow y=10x \end{gathered}[/tex]Four 8 hours = 8 + 8 + 8 + 8 = 32
At x = 32 => y = 10 × 32 = 320
Therefore, the total income for working four 8 hours is $320
Determine the value(s) for which the rational expression 8q+8/3q2−q−14 is undefined.
Answers
The required, for q = -2 and q = 3/7 the given rational expression is not defined.
The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Here,
Given expression,
= 8q+8/3q²−q−14
Simplifying
=8(q+1)/3q² -7q + 6q - 14
= 8 (q + 1)/ q(3q - 7) + 2(3q - 7 )
= 8(q + 1) / q(3q - 7)(q + 2)
For q = -2 and q = 3/7 the given rational expression is not defined.
Thus, For q = -2 and q = 3/7 the given rational expression is not defined.
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11) What is probability of not being born in a month that starts with avowel?
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total number of months: 12
Months that don't start with a vowel: 9
January
February
March
May
June
July
September
November
December
probability of not being born in a month that starts with a
vowel ( or being born in a month that starts with a consonant)
9/12 = 0.75
Hello, I need a bit of help with this question please.
Answers
To determine the initial length, we have to evaluate the given equation at x=0. Evaluating the equation, we get:
[tex]y=3\cdot0+59.[/tex]Therefore, the initial length of the road was 59 miles.
Now, notice that the given equation is a linear equation in slope-intercept form y=mx+b, where b is the slope, recall that the slope of a line represents the change of y compared to the change in x, in this case, miles per day.
Therefore, the change per day in the road's length is 3 miles.
Answer:
a) 59 miles.
b) 3 miles.
f(x)= 5x-3
g(x)= 2x+4 /2
solve for f(2)
1. f^1(2)
2. f^1 (g) (2)
3. f (g^1) (2)
Answers
The solutions are;
1. f⁻¹ (2) = 1
2. f⁻¹ (g(2)) = 7 / 5
3. f (g⁻¹(2)) = - 3
What is mean by Function?
A relation between a set of inputs having one output each is called a function.
Given that;
The function are,
⇒ f (x) = 5x - 3
And, g (x) = (2x + 4) / 2
Now,
The solution of the functions are;
Since, The function is;
f (x) = 5x - 3
To find the inverse of the above as;
f (x) = 5x - 3
y = 5x - 3
Solve for x as;
y + 3 = 5x
x = (y + 3) / 5
Substitute x = f⁻¹ (x) we get;
f⁻¹ (x) = (x + 3) / 5
1. So, Substitute x = 2 as;
f⁻¹ (x) = (x + 3) / 5
f⁻¹ (2) = (2 + 3) / 5
f⁻¹ (2) = 5 / 5
f⁻¹ (2) = 1
2. Find the value of f⁻¹ (g(2)) as;
⇒ f⁻¹ (g(2)) = f⁻¹ (2 + 2)
= f⁻¹ (4)
= (4 + 3) / 5
= 7 / 5
Thus, f⁻¹ (g(2)) = 7 / 5.
3. Find the value of f (g⁻¹(2)) as;
The value of g⁻¹ (x) as;
g (x) = (2x + 4) / 2
g (x) = x + 2
Substitute g (x) = y and solve for x as;
g (x) = x + 2
y = x + 2
x = y - 2
Substitute x = g⁻¹ (x);
g⁻¹ (x) = x - 2
So, g⁻¹ (2) = 2 - 2 = 0
Hence,
⇒ f (g⁻¹(2)) = f (0)
= 5 × 0 - 3
= - 3
Thus, f (g⁻¹(2)) = - 3
Therefore, The solutions are;
1. f⁻¹ (2) = 1
2. f⁻¹ (g(2)) = 7 / 5
3. f (g⁻¹(2)) = - 3
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Write this ratio as a fraction in simplest form without any units.
Answers
The ratio as a fraction in simplest form
without any units 56 days to 5 week is 8:5
what is Ratio ?
A ratio is non - zero ordered pair of numbers a and b written as a a/b.
A proportion is a mathematical expression in which two ratio are specified to be equal .
A fraction is represented by p/q where q≠ 0
it is asked in the question to write the ratio as a fraction in simplest form without any units 56 days to 5 week .
the fraction its simplest form means to write in the ratio where it cannot be further divided from each other .
1 week = 7 days
5 week = 35 days
the ration of 56 days : 35 week
56:35
8:5
therefore the ratio as a fraction in simplest form without any units 56 days to 5 week is 5:8.
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what are the solutions of the compound inequality 2d + 3 < -11 or 3d - 9 > 15
Answers
Answer:
d ≤ –7 or d > 8.
Step-by-step explanation:
Given : 2d + 3 ≤ –11 or 3d – 9 > 15.
To find : What are the solutions of the compound inequality .
Solution : We have given 2d + 3 ≤ –11 or 3d – 9 > 15.
For 2d + 3 ≤ –11
On subtracting both sides by 3
2d ≤ –11 - 3 .
2d ≤ –14.
On dividing both sides by 2 .
d ≤ –7.
For 3d – 9 > 15.
On adding both sides by 9.
3d > 15 + 9 .
3d > 24 .
On dividing both sides by 3 .
d > 8 .
So, A. d ≤ –7 or d > 8.
Therefore, A. d ≤ –7 or d > 8.
Question 1 - You need to FIRST convert the adult male blue whale's weight to kg.1. Two of the largest mammals on earth are the blue whale and the African elephant. An adult male blue whaleweighs about 170 tonnes or long tons. (1 tonne - 1000 kg)Show that the weight of an adult blue whale is 1.7 x 105 kgYour answer
Answers
we have
170 tonnes
1 tonne - 1000 kg
Convert tonnes to kg
Multiply the weight in tonnes by 1000
so
170 tonnes=170(1,000)=170,000 kg
Convert to scientific notation.
170,000=1.7(100,000)=1.7 x 10^5 kg
if vectors u=4, v=6 and w=3 prove that(⃗ × ) × ⃗ = ⃗ × ( × ⃗ )(they are supposed to all have arrows over them but it’s not fully working)
Answers
Given:
[tex](\vec{u}\times\vec{v})\times\vec{w}=\vec{u}\times\vec{(v}\times\vec{w})[/tex]u has direction ( 1, 0,0)
v has directions (1, 1,0)
w has directions(1, -2,1)
[tex](0,0,1)\times\vec{w}\Rightarrow\begin{bmatrix}{i} & {j} & {k} \\ {0} & {0} & {1} \\ {1} & {-2} & {1}\end{bmatrix}\Rightarrow i(0--2)-j(0-1)+k(0)\Rightarrow(2,1,0)[/tex]So (2,1,0) is the left hand side. The cross product gives us a direction between two vectors or the coordiantes it pointing to.
The right hand side:
[tex]\vec{u}\times(\vec{v}\times\vec{w})\Rightarrow\vec{u}\times\begin{bmatrix}{i} & {j} & {k} \\ {1} & {1} & {0} \\ {1} & {-2} & {1}\end{bmatrix}\Rightarrow\vec{u}\times(i\begin{bmatrix}{1} & {0} \\ {-2} & {1}\end{bmatrix}-j\begin{bmatrix}{1} & {0} \\ {1} & {1}\end{bmatrix}+k\begin{bmatrix}{1} & {1} \\ {1} & {-2}\end{bmatrix})[/tex][tex]\vec{u}\times(i(1-0)-j(1-0)+k(-2-1))\Rightarrow\vec{u}\times(1,-1,-3)[/tex][tex]\vec{u}\times(1,-1,-3)\Rightarrow\begin{bmatrix}{i} & {j} & {k} \\ {1} & {0} & {0} \\ {1} & {-1} & {-3}\end{bmatrix}\Rightarrow i\begin{bmatrix}{0} & {0} \\ {-1} & {-3}\end{bmatrix}-j\begin{bmatrix}{1} & {0} \\ {1} & {-3}\end{bmatrix}+k\begin{bmatrix}{1} & {0} \\ {1} & {-1}\end{bmatrix}[/tex][tex]i(0-0)-j(-3-0)+k(-1-0)\Rightarrow(0,3,-1)[/tex]So using (u x v) x w = u x (v x w) on the left hand side we got (2,1,0) and the right hand side we got (0,3,-1)
Therefore we have (2,1,0) = (0,3,-1) which can't be possible.
Answer:
[tex](\vec{u}\times\vec{v})\times\vec{w}\ne\vec{u}\times(\vec{v}\times\vec{w})\text{ because \lparen2,1,0\rparen }\ne\text{ \lparen0,3,-1\rparen from the example used.}[/tex]
