The perimeter of a rectangular atrium is 220 inches. the length of the atrium is four times the width. find the length and the width.

l = 88 and b = 22

Step-by-step explanation:

Perimeter of a rectangular atrium = 220 inches

Length of atrium =

Now, let the width of atrium be x

∴ Length of atrium = 4x.

Perimeter of rectangular atrium = 2 (l + b)

2(l + b) = 220

2 (4x + x) = 220

2 (5x) = 220

10x = 220

 x = 22

So the width of rectangular atrium = 22

∴ length of rectangular atrium = 4x = 4 (22) = 88

(-1,-0.5)

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.