Question

The length of a rectangle is 4 inches longer than the width. The perimeter is 48 inches. What is the width?

w = 14 cm
w = 28 m
w = 20 in
w = 10 in

Answer 1

w = 10 in

Explanation:

Perimeter is the measure of the length of all sides

48 = 2L + 2w

L = w + 4

^ use substitution

48 = 2(w + 4) + 2w simplify.

48 = 2w + 8 + 2w combine like terms

48 = 4w + 8 then subtract 8 from both sides

40 = 4w then divide by 4 to isolate w

10 = w