The perimeter of a rectangular MP3 player is 11 inches. The length is 1.5 inches longer than the width. What is the length of the MP3 player?

Answer 1

P = 2(L + W) = 11 in

L = 1.5 + W Substitute into the perimeter equation, you get

2(1.5 + W + W) = 11

2(1.5 + 2W) = 11

3 + 4W = 11

4W = 8

W = 8 / 4 = 2 in

L = 1.5 + 2 = 3.5 in