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tino4ka555 [31]
3 years ago
15

A door has an area of 21 square feet. It is 7 feet tall. How wide is the door?

Mathematics
1 answer:
Sati [7]3 years ago
8 0

Answer:

3 feet wide

Step-by-step explanation:

21/7= 3

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An x-method chart shows the product a c at the top of x and b at the bottom of x. Above the chart is the expression a x squared
Bond [772]

Answer:

The other factor is (x + 2).

Step-by-step explanation:

If x - 10 is a  factor of x^2 - 8x - 20 then we must find another factor that includes +2x, so that we have -10x + 2x = -8x.  That factor is (x + 2):

x^2 - 8x - 20 = (x - 10)(x + 2)

As a test, multiply -10 and +2.  We get -20, matching the constant of the given polynomial.  Also, -10x + 2x = -8x, another match.

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3 years ago
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The perimeter of a sand volleyball court is 50 meters. It is 9 meters wide. How long is it?
andreyandreev [35.5K]
9(2) + 2(y) = 50. solve for y. 32=2y, y=16. It is 16 meters long.
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Subtract these polynomials.
zvonat [6]
Answer: A

Explanation:

(6x^2 - x + 8) - (x^2 + 2)
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= 5x^2 - x + 6

6 0
3 years ago
Chloe biked the same distance each day for 9 days. If she traveled 513 kilometers altogether, how many kilometers did she travel
kow [346]

Answer:

57 kilometers a day.

Step-by-step explanation:

I just divided 513 by 9 and got that.

5 0
3 years ago
Explain why 3/4 of 16 is the same as 3 x 16 divided by 4<br> Please Help
pogonyaev

Answer:

<em>I know that 3/4 is 75%, and I also know that 3 times 16 is 48. Since I divide 48 by 4, it is the same as multiplying 4 by 3, knowing that it is 25% of 16.</em>

Step-by-step explanation:

Since 3/4 is a fraction, all fractions can be converted into decimals.

3/4 is also known as 75%, which can be simplified into 0.75 in decimal terms.

Now that you know that 3/4 can be simplified to 0.75, you now need to take that 0.75, and multiply it by 16. You can use a calculator to do this, or you could work it out on a sheet of paper.

An easy way to do this, is to know that 25%, (0.25) of 16 is 4. This is because 4 times 4 is 16. Knowing this, if you are looking for 75% of 16, (0.75) you can multiply 4 by 3, knowing that it is 75% of 16.

The answer to that is 12.

3 x 16 = 48 and if you take 48 and divide it by 4, you will get 12.

You can explain this by writing; <em>I know that 3/4 is 75%, and I also know that 3 times 16 is 48. Since I divide 48 by 4, it is the same as multiplying 4 by 3, knowing that it is 25% of 16.</em>

7 0
3 years ago
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