Question

A polygon has sides 3x-1, 2x+2, 7x-3 and 3x. what's the perimeter

Answer 1

The perimeter of a polygon is the sum of lengths of sides.

P = (3x - 1) + (2x + 2) + (7x - 3) + 3x

combine like terms

P = (3x + 2x + 7x + 3x) + (-1 + 2 - 3) = 15x - 2