Please help i also need an explination

4 rolls

Step-by-step explanation:

First we need to find the area of the wall

A = l*w

   = 8*16 = 128

Then we find the area that a roll of wallpaper will cover

A=2*20=40

Divide

128/40 =3.2

We must round up since we cannot buy part of a roll

We need 4 rolls

4

Step-by-step explanation:

Area of the wall = 8 × 16

= 128 ft²

One roll covers an area of:

2 × 20

= 40 ft²

She needs:

128/40 = 3.2 rolls

Since complete rolls are to be bought, she needs to buy 4 rolls

4 + 5 7/9= 9 7/9

step-by-step explanation:

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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