Question

The area of a triangle is 18r2 - 27r-35. The width is 3r - 7 inches. Which of the following expressions represents the length in inches?

A.9r - 7

B.6r -5

C. 6r + 5

D. 9r + 7

Answer 1

C. 6r + 5

Explanation:

A = L x W

Given A = 18r^2 - 27r -35 and W = 3r - 7

18r^2 - 27r -35 = (3r - 7)(6r + 5)

so L = 6r + 5