Question

A triangle has side lengths of (8x + 10)

centimeters, (2x + 5) centimeters, and
(7y - 9) centimeters. Which expression
represents the perimeter, in centimeters,
of the triangle?

Answer 1

Explanation:

the perimeter is the sum of all 3 sides, so

8x + 10 + 2x + 5 + 7y - 9 = 10x + 7y + 6