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Ulleksa [173]
3 years ago
9

Simplify (y + 9)(y - 9). А у2 B у2 - 18 C y2 - 81 D у2 + 81

Mathematics
2 answers:
mestny [16]3 years ago
8 0

Answer:

Answer is y^2-81

Step-by-step explanation:

Varvara68 [4.7K]3 years ago
4 0

Answer:

C

Step-by-step explanation:

According to formula

(a+b)(a-b)=a²-b²

So

(y+9)(y-9)

=y²-(9)²

=y²-81

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What is x, the angle at which the diagonal beam meets the 10-foot beam at the top of the frame? 16.7° 17.5° 72.5° 73.3°
umka21 [38]

The complete question is

"A theater production group is making frames to support wall-like props. Three-foot beams form right triangles with 10-foot beams to allow them to stand, as shown in the image.

What is x, the angle at which the diagonal beam meets the 10-foot beam at the top of the frame?

16.7°, 17.5°, 72.5°,73.3°"

The value of angle x would be 16.7 degrees.

<h3>What is the right triangle?</h3>

A right-angle triangle is a triangle that has a side opposite to the right angle the largest side and is referred to as the hypotenuse.

The angle of a right angle is always 90 degrees.

In order to find the value of x, a tan would be used.

This is because we have given the opposite and adjacent sides as 10 ft and 3 ft.

Tan Ф = opposite / adjacent

Tan Ф =  (3/10)

= 16.7 degrees

The value of angle x would be 16.7 degrees.

Learn more about a right angle;

brainly.com/question/7116550

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6 0
1 year ago
Shona is buying a rug for her room. Store A has the rug for $45 with a 10% discount. Store B has the same rug for $46 and is off
Rudik [331]
Store A :
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store B :
46 - 10 = 36......36 * .06(36) = 36 + 2.16 = 38.16

she would have to purchase the rug from store B...because she doesn't have enough money to purchase it from store A. She would have (40 - 38.16) = $ 1.84 in change.

I find this question to be a little misleading....because on a rebate, u dont get the discount right away....u first pay full price, and then later u get the discount mailed back to you. So actually, she wouldn't have enough money at either store.
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Answer:

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7/8 - 3/8 = 4/8

4/8 >>> divide both by 4

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1/2 Inches

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It d forsure brother died a
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Answer:

I believe the correct answer is B! Hope this helped.

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