Question

The equation below shows the area of a trapezoid, A, with a height of 9 cm, and one base 35 cm A = 9 over 2(b + 35). Which of the following formulas correctly solves for the other base, b? A. b = 2A over 9 + 35. B. b = 2 multiplied by A over 9 - 35. C. b = 2 multiplied by A plus 35, all over 9 D. b = 2 multiplied by A minus 35, all over 9

Answer 1

b

Explanation:

b - the other base;

A = 9/2 ( b + 35 ) / * 2 ( we will multiply both sides of the equation by 2 )

2 A = 9 ( b + 35 )

b + 35 = 2 A / 9

b + 35 - 35 = 2 A / 9 - 35

b = (2 A / 9 ) - 35

Answer 2

b - the other base;
A = 9/2 ( b + 35 ) / * 2 ( we will multiply both sides of the equation by 2 )
2 A = 9 ( b + 35 )
b + 35 = 2 A / 9
b + 35 - 35 = 2 A / 9 - 35
b = (2 A / 9 ) - 35
Answer: B ) b = 2 multiplied by A over 9 - 35