1. Determine the solutions of the equation:

b = 2A/h


1. x = −9 and x = 9
2. x = −15 and x = 4
3. x = −15 and x = 9
4. x = −15 and x = 15


2. The equation below shows the area of a trapezoid, A, with a height of 9 cm and one base 35 cm.

A = 9/2(b+35)

Which of the following formulas correctly solves for the other base, b?

1. b = 2A/9 + 35
2. b = 2A/9 - 35
3. b = 2A + 35/9
4. b = 2A - 35/9