Please show work!!!!!!!

Answers

Answer 1

Answer:

Answer:

J. 56

Step-by-step explanation:

The picture in this question can be a little deceiving. Each rectangular glass pane is 3 by 10 inches. This means that the picture of the 4 panes overlapping, leaves the center square open. The open area has your inner edges. The question asks for the sum of the inner and outer edges.

Every pane is 10 inches long, so the out perimeter of the figure is 40 inches because the figure has four sides. The rectangles overlap, creating 3 by 3 inch square. 3 inches off either side of a pane leaves 4 inches as the length for the edge of the inner square. Therefore, the perimeter of the inner square is 16 inches.

Outer Perimeter + Inner Perimeter = 40 + 16 = 56 inches

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Simplify the expression. Please help, really stuck!!(-2y + 5)(y + 3) A:-2y^2 + 8y + 15 B: -2y^2 - y + 15 C: 2y^2 + 8y + 8 D: 2y^2 - y + 8
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Solve for f please. c=5/9 (f-32) show work thank u (:

Answers

C = 5/9(F - 32)

Multiply each side by 9/5 : 9/5 C = F - 32

Add 32 to each side: 9/5 C + 32 = F

c=5/9 (f-32)
c = 5/9f-160/9 /*9
9c=5f-160
5f-160=9c
5f=9c+160 /: 5
f = (9c+160)/5

Aisha owns an apparel store. She bought some shirts and jeans from a wholesaler for $3,900. Each shirt cost $12 and each pair of jeans cost $28. If she sold the shirts at 70% profit and jeans at 125% profit, her total profit was $3,885. How many shirts and jeans did she buy from the wholesalers?

Answers

Let

x-------> the number of shirts

y------> the number of jeans

we know that

$12x+28y=3,900$ -------> equation $1$

If she sold the shirts at $70\%$ profit and jeans at $125\%$ profit, her total profit was $\$3,885$

$1.7*(12x)+2.25*(28y)=3,900+3,885$

$20.4x+63y=7,785$ -------> equation $2$

we have the following system of equations

$12x+28y=3,900$ -------> equation $1$

$20.4x+63y=7,785$ -------> equation $2$

using a graph tool

see the attached figure

The solution of the system is the intersection both graphs

the solution is the point $(150,75)$

that means

$x=150\ shirts\ny=75\ jeans$

therefore

the answer is

the number of shirts is $150$

the number of jeans is $75$

Let the number of shirts be x, and the jeans be y.

Total cost of shirts = 12x
Total cost of Jeans = 28y

This means that: 12x + 28y = 3900..........(a)

Selling price for Shirts 70% profit, means = 100% + 70% = 170% of the cost price

170/100 * 12x = 1.7*12x = 20.4x

Selling price for Jeans 125% profit, means = 100% + 125% = 225% of the cost price

225/100 * 28y = 2.25*28y = 63y

Total profit = 3885, remember total cost = 3900

Total selling price = 3885 + 3900 = 7785

20.4x + 63y = 7785..........(b)

12x + 28y = 3900.............(a)

20.4x + 63y = 7785...........(b)

Solving the simultaneous equation with a programmable calculator:

x = 150, y = 75

150 shirts and 75 jeans.

The graph shows the results of a survey that asked 4300 students ages 7 to 18 what they thought would be the most important benefit of air travel in the future. There are about 40 million students in the United States. If the margin of error is ±3%, what is the range of the number of students ages 7 to 18 who would likely say that "finding new resources for Earth" is the most important benefit of future flight?

Answers

Answer:

What class you be taking

Step-by-step explanation:

To calculate the range of the number of students ages 7 to 18 who would likely say that "finding new resources for Earth" is the most important benefit of future flight, we need to consider the margin of error.

The margin of error (MOE) is ±3%, which means the actual percentage of students who think this way could be 3% higher or 3% lower than the survey result.

First, let's find out the percentage of students who chose "finding new resources for Earth" as the most important benefit of future flight based on the survey:

Percentage from the survey = $ \frac{4300}{40000000} \times 100\% = 0.01075\% $

Now, we need to calculate the upper and lower bounds considering the margin of error:

Upper bound = $ 0.01075\% + 3\% = 0.04075\% $

Lower bound = $ 0.01075\% - 3\% = -0.01925\% $

The lower bound cannot be negative, so we consider it as 0%.

To find the number of students in the United States who would likely say that "finding new resources for Earth" is the most important benefit of future flight, we use the upper bound percentage:

$ 0.04075\% \times 40000000 = 16300 $

So, the range is approximately 16,300 students to 4,300 students.

Which of the following values "completes the square," or creates a perfect square trinomial, for x2 − 8x + ___?8
16
–8
–16

Answers

$Perfect\ square:\ (x\pm y)^2=x^2\pm2xy+y^2\ntherefore\nx^2-OK\n-8x=-2\cdot x\cdot 4\n4^2=16\n\nconclusion\n\nx^2-8x+\boxed{?}=x^2-2\cdot x\cdot4+\boxed{4^2}=x^2-8x+16\n\nYour\ answer:\boxed{\boxed{16}}$

Answer: 16

Step-by-step explanation: A more simple approach is realizing that the blocks show 8 x tiles and 1 x^2 tile. The 8 x tiles are on either side of the x^2 tile which is 4 x tiles on each side. So as we can see we can multiply each side together. 4x4 = 16. So that is how you get 16 without having to work it out.

If you triple 4 and subtract 2 each day, how many days until you have zero

Answers

Triple 4 and subtract 2 each day
Find the number of days to be able to reach zero
1st day = 3(4) – 2
=> 12 - 2
=> 10
2nd day
=> 10 - 2
=> 8
3rd day
=> 8 – 2
=> 6
4th day
=> 6 – 2
=> 4
5th day
=> 4 – 2
=> 2
6th day
=> 2 – 2
=0

In 6th day, you’ll be able to get the amount of zero by subtracting 3(4) by 2.

Which products result in a perfect square trinomial? Check all that apply.A=(–x + 9)(–x – 9)
B=(xy + x)(xy + x)
C=(2x – 3)(–3 + 2x)
D=(16 – x2)(x2 – 16)
E=(4y2 + 25)(25 + 4y2)

Answers

The correct answers are:

B=(xy + x)(xy + x) ; C=(2x – 3)(–3 + 2x) ; and E=(4y² + 25)(25 + 4y²)

Explanation:

In order to have a perfect square trinomial, we must multiply two binomials that are exactly the same. For (xy+x)(xy+x), are multiplying two identical binomials.

For (2x-3)(-3+2x), we are multiplying two binomials that are the same but written in a different order. The same is true of (4y² + 25)(25 + 4y²).

Answer:

A and E and C

Step-by-step explanation:

A perfect square trinomial can be written as the square of a binomial.

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