57. Gabriel randomly surveyed some households in a small community
to determine how many of them support building a new
highway near the community. Here are the results:
Number
45
Opinion
Support the highway
Do not support it
57
If the community contains a total of 2,120 households, predict how
many of them would support building the highway.
18
No opinion​

Answer:

79°

Step-by-step explanation:

given both figures are congruent, and one is simply a rotation of another

m∠B corresponds to m∠k = 79°

Answer:

Given that DMKT → FCBN, B is 79°

Step-by-step explanation:

m∠D = m∠F, m∠M = m∠C, m∠K = m∠B and m∠T = m∠N

m∠K = 79° therefore m∠B = 79°.

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Answer:

Answer: f[c(p)] = 0.9265p

Step-by-step explanation:

Given: Jonah is purchasing a car that is on sale for 15% off. He knows the function that represents the sale price of his car is , where p is the original price of the car.

He also knows he has to pay 9% sale's tax on the car. The price of the car with tax is , where c is the sale price of the car.

Now, the composite function that can be used to calculate the final price of Jonah's car is given by :-

Answer:

f[c(p)] = 0.9265p

Step-by-step explanation:

c(p) = 0.85p

f(c) = 1.09c

f[c(p)] = f[0.85p] = 1.09(0.85p) = 0.9265p

Answer: f[c(p)] = 0.9265p

Answer:

A

Step-by-step explanation:

Given

-4x²(5[tex]x^{4}[/tex] - 3x² + x - 2)

Multiply each term in the parenthesis by - 4x²

= - 20[tex]x^{6}[/tex] + 12[tex]x^{4}[/tex] - 4x³ + 8x²

Answer:

A

Step-by-step explanation:

Answer:

[ - 5, 3 ]

Step-by-step explanation:

Solve (x - 3)(x + 5) = 0

The zeros are x = - 5 and x = 3

These divide the domain into 3 intervals

(- ∞, - 5 ], [- 5, 3 ], [ 3, + ∞ )

Choose a test point in each interval and consider the sign of the result.

x = - 10 : (- 10 - 3)(- 10 + 5) = (- 13)(- 5) = 65 > 0

x = 0 : (0 - 3)(0 + 5) = (- 3)(5) = - 15 < 0 ← required result

x = 5 : (5 - 3)(5 + 5) = (2)(10) = 20 > 0

The solution is [ - 5, 3 ] or - 5 ≤ x ≤ 3

Answer:

B

Step-by-step explanation:

Right on edge 2021

Answer:

B.

Step-by-step explanation:

Answer:

II

Step-by-step explanation:

Answer:

(x-3)^2 + (y-1)^2 = 4

Step-by-step explanation:

The equation of a circle is usually written in the form

(x-h)^2 + (y-k)^2 = r^2

Where (h,k) is the center and r is the radius

The center is at the origin so (h,k) = (3,1) and  the radius is 2 so r=2

(x-3)^2 + (y-1)^2 = 2^2

(x-3)^2 + (y-1)^2 = 4

Answer:

The correct answer is [tex]9x^{2}-6x[/tex].

Step-by-step explanation:

Consider the provided division:

We need to perform the subtraction in the division:

[tex]6x^{3}+x^{2}-10x[/tex]  ......(1)

[tex]6x^{3}-8x^{2}-4x[/tex]  ......(2)

In order to perform the subtraction simply change the sign of the second expression.

  [tex]6x^{3}+x^{2}-10x[/tex]

[tex]-6x^{3}+8x^{2}+4x[/tex]

----------------------------------------

           [tex]9x^{2}-6x[/tex]

Therefore, the correct answer is [tex]9x^{2}-6x[/tex].

Answer:

Step-by-step explanation:

Check the picture below.

Also check your Unit Circle for the cosine of 30°, if you don't have a Unit Circle yet, this is a good time to get one, you'll need it, you can find many online.

Answer:

20 inch

Step-by-step explanation:

Diameter, D = 6.5in

Circumference

= π x D

= 3.142 x 6.5

= 20.42

= 20 in (rounded to nearest in)

Answer:

4 miles

Step-by-step explanation:

6 divided by 3 = 2 = one-third of 6

--> multiply by two to get two thirds of six = 4 miles

Answer:

4 miles

Step-by-step explanation:

Answer:

Part 1) The volume of the prism is 3 times greater than the volume of the pyramid

Part 2) The prism would fill only one-third

Part 3) The cylinder and the cone

Step-by-step explanation:

Part 1) How do their volumes compare?

we know that

The volume of a rectangular prism is equal to

[tex]Vprism=BH[/tex]

where

B is the area of the base of rectangular prism

H is the height of the prism

The volume of a rectangular pyramid is equal to

[tex]Vpyramid=\frac{1}{3}BH[/tex]

where

B is the area of the base of rectangular pyramid

H is the height of the pyramid

Compare the volumes

[tex]Vprism=BH[/tex] -----> equation A

[tex]Vpyramid=\frac{1}{3}BH[/tex] -----> equation B

substitute equation A in equation B

[tex]Vpyramid=\frac{1}{3}Vprism[/tex]

[tex]Vprism=(3)Vpyramid[/tex]

The volume of the prism is 3 times greater than the volume of the pyramid

Part 2) If the pyramid was full of water, how much of the prism would it fill up?

Remember that

[tex]Vpyramid=\frac{1}{3}Vprism[/tex]

therefore

The prism would fill only one-third

Part 3) Name another pair of three-dimensional objects that have a relationship similar to this

we have the cylinder and the cone

The volume of the cylinder is equal to

[tex]Vcylinder=\pi r^{2}h[/tex]

The volume of the cone is equal to

[tex]Vcone=\frac{1}{3}\pi r^{2}h[/tex]

Compare the volumes

[tex]Vcylinder=(3)Vcone[/tex]

The volume of the cylinder is 3 times greater than the volume of the cone

The volume of the pyramid is one-third of the volume of the rectangular prism with the same base and height. Therefore, if the pyramid was full of water, it would fill one-third of the prism. Cones and cylinders with the same base and height have a similar volume relationship.

When comparing the volumes of a rectangular pyramid and a rectangular prism that have the same base and the same height, the volume of the pyramid is exactly one-third the volume of the prism. This is because the volume of the prism is calculated by length × width × height, while the volume of the pyramid is ⅓ x (base area) x height, which is ⅓ x (length × width) x height.

If the pyramid was full of water, it would fill up exactly one-third of the prism. This corresponds to the geometric rule that says the volume of a pyramid is one-third the volume of a prism with the same base and height.

Another pair of three-dimensional objects with a similar relationship is a cone and a cylinder. Like the pyramid and prism, if the cone and cylinder have the same base and height, the cone's volume is one-third of the cylinder's volume.

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Answer:

it's d or the fourth option

Step-by-step explanation:

Aloha~! My name is Zalgo and I am here to provide a bit more knowledge to you today. The following Improper Fractions have been changed into Mixed Numbers (and also into decimals because I like Math :3):

I hope that this info helps! :D

"Stay Brainly and stay proud!" - Zalgo

(By the way, can you mark me as Brainliest? I'd greatly appreciate it! Mahalo~! XP)

Answer:

In order; 2 1/4, 2 2/3, 3 5/6, 5 1/2, 3 2/5, 1 7/8, 3 3/10, 2 5/12

Step-by-step explanation:

The way mixed numbers work is how many times (improper fraction) the denominator can go into the numerator.

For example, in the improper fraction 9/4, 4 can go into 9 twice making the whole number a 2, then you get whatever is left and leave it as the fraction; there is 1/4 left making making the mixed number 2 1/4. Use this rule to apply to all the improper fractions.

Answer:

d = 7.5t

Step-by-step explanation:

t = time

d= distance

you want to write an equation that compares time with distance.

in the question it says per hour whoch means 7.5 miles have been ran each hour. however we dont know how mmany hour lets say tom has ran. therefore, we use t instead. we got d to go behind the = sign because we are comparing. When we multiply 7.5t we are going to get the distance he ran, d.

hope this helps!

Answer:

d=7.5t

Step-by-step explanation:

Answer:

x = 5 or 25

Step-by-step explanation:

I think the method I am about to explain is slightly quicker and easier than the method in your question. This works for any 'complete the square' question.

We begin with x² - 30x = - 125.

First, we are going to factorise the left-hand side of the equation by dividing the 'b' value (-30) by 2 (you'll see why this works in a minute):

(x - 15)²

We want these brackets to multiply out to give x² - 30x, so that they equal the left-hand side of the equation. Unfortunately, if we multiply them out, we get:

(x - 15)(x - 15) =

x² - 30x + 225

There is an unwanted term (the + 225, from 15²)! We only want x² - 30x, so we have to remove this term by subtracting it from the left side of the equation. To do this, let's set up the original equation again:

(x² - 30x + 225) - 225 = - 125

Note: The reason why we don't have to subtract it from both sides is because the original equation is x² - 30x = - 125, and so we must make sure the left hand side is still equal to x² - 30x.

So now we know that (x - 15)² multiplies out to give x² - 30x +225, we can write this as (x - 15)² in our equation:

(x² - 30x + 225) - 225 = - 125

is the same as:

(x - 15)² - 225 = - 125

Now add 225 to both sides of the equation:

(x - 15)² = - 125 + 225 = 100

(x -15)² = 100

The next step is to square root both sides. Be careful here, and remember that √100 can either be 10 or -10, as (-10)² = 100. To indicate both results, write ±10 ("plus or minus 10").

√(x - 15)² = √100

x - 15 = ±10

Because, there are two possible values for the right-hand side of the equation, we need to separate our equation into two equations:

1.     x - 15 = 10

and

2.    x - 15 = -10

Now we solve these two simple linear equations for x:

1.     x = 10 + 15   <- add 15 to both sides

        x = 25 This is our first solution.

2.    x = -10 + 15  <- add 15 to both sides again

        x = 5 This is our other solution.

So our two solutions are x = 5 and x = 25!

I have attached the quick version of the working out for this question - that is what you would be expected to write down in a test.

x = 5 or 25

We begin with x² - 30x = - 125.

First, we are going to factorise the left-hand side (LHS) of the equation by dividing the 'b' value (-30) by 2 (you'll see why this works in a minute):

(x - 15)²

We need these brackets to multiply out the give x² - 30x, so that they = the left-hand side (LHS) of the equation. Unfortunately, if we multiply them out, we get:

(x - 15)(x - 15) =

x² - 30x + 225

There are an unwanted term (the + 225, from 15²)! We only need x² - 30x, so we have to remove this term by subtracting this from the left side of the equation. To do this, let's set up the original equation again:

(x² - 30x + 225) - 225 = - 125

Note: The reason why we do not have to subtract this from both sides is because original equation is x² - 30x = - 125, and so we must make sure the left hand side is = to x² - 30x.

So now we know that (x - 15)² multiplies out to give x² - 30x +225, we can write this as (x - 15)² in our equation:

(x² - 30x + 225) - 225 = - 125

as the same as:

(x - 15)² - 225 = - 125

Now add 225 to both sides by the equation:

(x - 15)² = - 125 + 225 = 100

(x -15)² = 100

The next step is to square root by both sides. Be careful here, or remember that √100 can either be 10 or -10, as (-10)² = 100. To indicate both results, write ±10 ("plus or minus 10").

√(x - 15)² = √100

x - 15 = ±10

Because, there are 2possible values for the right-hand side of the equation, we need to separate this equation into 2 equations:

1.     x - 15 = 10

and

2.    x - 15 = -10

Now we have solve these two simple linear equations for x:

1.     x = 10 + 15   <- add 15 to both sides

       x = 25 This is our first solution.

2.    x = -10 + 15  <- add 15 to both sides again

       x = 5 This is our other answer.

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Answer:

The volume of the triangular prism is [tex]595\ units^{3}[/tex]

Step-by-step explanation:

we know that

The volume of the triangular prism is equal to

[tex]V=BH[/tex]

where

B is the area of the base

H is the height of the prism

Find the area of the triangular base B

[tex]B=(1/2)bh[/tex]

substitute the given values

[tex]B=(1/2)(14)(17)=119\ units^{2}[/tex]

Find the volume

[tex]V=(119)(5)=595\ units^{3}[/tex]

Answer:

Step-by-step explanation:

Rewrite 2x-5y< 15 as follows:  Add 5y to both sides.  Then 2x < 15 + 5y.

Next, subtract 15 from both sides:  2x - 15 < 5y.

Finally, divide all terms by 5:           (2/5)x - 3 < y

Now find the y-intercept of this line.  Let x = 0.  Then y = -3.  Plot (0, -3) on graph paper.  Now, starting at (0, -3), move your pencil point 5 spaces to the right and 2 spaces up.  Plot this new point, (5, -1).  Now draw a dashed line through both (0, -3) and (5, -1).  Shade the area ABOVE this dashed line.

Answer:

is op 4 (-3,7)

Step-by-step explanation:

[tex]\bf \begin{array}{llll} \textit{Logarithm of rationals} \\\\ \log_a\left( \frac{x}{y}\right)\implies \log_a(x)-\log_a(y) \end{array}~\hfill \begin{array}{llll} \textit{Logarithm Cancellation Rules} \\\\ log_a a^x = x\qquad \qquad \stackrel{\textit{we'll use this one}}{a^{log_a x}=x} \end{array} \\\\[-0.35em] \rule{34em}{0.25pt}[/tex]

[tex]\bf 2\ln(3)=\ln(x-4)\implies \ln(3^2)=\ln(x-4)\implies \ln(9)=\ln(x-4) \\\\\\ \log_e(9)=\log_e(x-4)\implies e^{\log_e(9)}=e^{\log_e(x-4)}\implies 9=x-4\implies \boxed{13=x}[/tex]

===============================================

Here are some reasons why

Answer:

Step-by-step explanation:

1.) mean is 4   1,2,3,5,6,7

2.) Four students won 12, 13, 14, 15, 16, or 17 prizes.

A total of 10 prizes were won by all the students.

3.)don't know number 3

the answer for 2 is B because 4 students won 12-17 prizes. They just word it 12,13,14,15,16 or 17.

Answer:C.It can be concluded, with 95% confidence, that between 81% and 85% of all employees will rate the vacation policy as "delightful."

Step-by-step explanation:

The margin of error implies that 81% to 85% of all employees will judge the vacation policy as "delightful" with 95% confidence.

The margin of error is a statistic that expresses how much random sampling error there is in a survey's results. The wider the margin of error, the less confident one should be that a poll result reflects the outcome of a population-wide survey.

Given that the organization polled a random sample of its employees regarding their new vacation policy.

Now, 83% of the workers polled assessed the vacation policy as "delightful," with a margin of error of ±2% and a confidence interval of 95%, implying that 81% to 85% of all employees will judge the vacation policy as "delightful" with 95% confidence.

Hence, the margin of error implies that 81% to 85% of all employees will judge the vacation policy as "delightful" with 95% confidence.

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Answer:

[tex]\large\boxed{D.\ 168\ units^2}[/tex]

Step-by-step explanation:

[tex]\text{The formula of a volume of a prism:}\\\\V=BH\\\\B-base\ area\\H-height\\\\\text{In the base we have the right triangle.}\\\text{The formula of an area of a right triangle:}\ A=\dfrac{ab}{2}\\\\a,b-legs\\\\\text{We have}\ a=6\ \text{and}\ b=8.\ \text{Substitute:}\\\\B=\dfrac{(6)(8)}{2}=\dfrac{48}{2}=24\\\\\text{Calculate the volume:}\\H=7\\\\V=(24)(7)=168\ units^2[/tex]

To find the volume of a triangular prism, we have to multiply the area of the base by the heigh of the prism.

Let's first identify our values:

7 = height of the prism

6 = base of triangle

8 = height of triangle

First, we have to multiply the base of the triangle by the height of the triangle. The base of the triangle is 6 and the height of the triangle is 8. Then, we have to divide it by 2.

6 × 8 = 48

48 ÷ 2 = 24

Finally, we have to multiply 24 by the height of the prism. 24 × 7 = 168

Therefore, the volume of the prism is 168 [tex]units^{2}[/tex]

Answer: 0.4521 - 0.4879

Step-by-step explanation:

1) Find the standard deviation with the given information:

n=3000

p=47% ⇒ 0.47

1-p= 1 - 0.47 = 0.53

[tex]\sigma =\sqrt{\dfrac{p(1-p)}{n}}\\\\\\.\ =\sqrt{\dfrac{0.47(0.53)}{3000}}\\\\\\.\ =\sqrt{\dfrac{0.2491}{3000}}\\\\\\.\ =\sqrt{0.00008303}\\\\\\.\ =0.009112[/tex]

2) Find the margin of error (ME) with the given information:

C=95% ⇒ Z = 1.960

σ=0.009112

ME = Z × σ

= 1.96 (0.009112)

= 0.01786

3) Find the confidence interval with the given information:

p = 0.47

ME = 0.01786

CI = p ± ME

= 0.47 ± 0.01786

= (0.4521, 0.4879)

Answer:

A

Step-by-step explanation:

Answer:

staight angle and supplementary angle

Step-by-step explanation:

Answer:

no solutions

Step-by-step explanation:

4x + 2y = –14

6x + 3y = –22

Divide the first equation by 2 and the second equation by 3

4x/2 + 2y/2 = –14/2     2x +y = -7

6x/3 + 3y/3 = –22/3    2x + y = -22/3

The left hand sides are the same but the right hand sides are different.

Multiply the second equation by -1

2x+y = -7

-2x -y = 22/3

-------------------

0 = -7+22/3

0 = 1/3

This is never true, so there are no solutions

Answer:

B, No Solutions

Step-by-step explanation:

The probability that she will sit at either end by a window is 2/5 or 0.4.

To solve this problem, we first need to determine the total number of places Sharon could sit and then identify which of those places meet the condition of being at either end by a window.

Since the back seat is the full width of the bus and seats five students, there are a total of 5 different places Sharon could choose to sit.

Now we need to identify the places that are at either end by a window. Since it's the back seat of the bus, there would typically be a window at the far left and the far right of the seat.

So, there are two seats that meet our condition:
- One on the far left
- One on the far right

This means out of the 5 available places, there are 2 places that fulfill the condition of Sharon sitting by a window at either end of the back seat.

The probability P that Sharon will sit by a window at either end is therefore the number of favorable outcomes (sitting by a window at either end) divided by the total number of possible outcomes (any of the 5 seats).

P = (Number of favorable outcomes) / (Total number of possible outcomes)
P = 2 / 5

Therefore, the probability that Sharon will sit at either end by a window is 2/5 or 0.4 (if expressed as a decimal).

Answer:

13 students

Step-by-step explanation:

We have a list of four numbers: 1, 2, 3, 4. If 50 persons were to pick a number randomly, it means that the probability of picking any of the numbers is 0.25.

Therefore, from 50 students, 0.25*50 = 12.5 ≈ 13 students aproximately would choose the same number as I did.

Answer:

   √6 + √2

= --------------

        4

Step-by-step explanation:

15° = 45° - 30°

So

cos(15)  = cos(45 - 30)

=cos(45)  × cos(30) + sin(45) × sin(30)

= 1/√2  × (√3)/2  + 1/√2 × 1/2

    (√3) + 1

= --------------

     2√2

    (√3) + 1              √2

= -------------- x       ---------

     2√2                  √2

   √6 + √2

= --------------

        4

Answer:

see explanation

Step-by-step explanation:

Using the addition formula for cosine

cos(x ± y) = cosxcosy ∓ sinxsiny

and exact values

sin45° = cos45° = [tex]\frac{\sqrt{2} }{2}[/tex]

c0s30° = [tex]\frac{\sqrt{3} }{2}[/tex] , sin30° = [tex]\frac{1}{2}[/tex]

Express cos15° = cos(45 - 30 )°, then

cos(45 - 30)°

= cos45°cos30° + sin45°sin30°

= [tex]\frac{\sqrt{2} }{2}[/tex] × [tex]\frac{\sqrt{3} }{2}[/tex] + ( [tex]\frac{\sqrt{2} }{2}[/tex] × [tex]\frac{1}{2}[/tex] )

= [tex]\frac{\sqrt{6} }{4}[/tex] + [tex]\frac{\sqrt{2} }{4}[/tex]

= [tex]\frac{\sqrt{6}+\sqrt{2}  }{4}[/tex] ← exact value