Question

the width of a rectangle is 20 inches what must the length be if the perimeter is at least 180 inches

Answer 1

The perimeter is the sum of the 4 sides.

The width is 20, so the 2 widths would be 20+20 = 40

Subtract that from the given perimeter:

180 - 40 = 140

Divide that by 2 for the two lengths:

140/2 = 70

The length needs to be at least 70 inches.