Option D:
is the value of b
Step-by-step explanation:
Given that the formula for the area of a trapezoid is

We need to solve the formula for b.
The value of b:
Let us solve the formula
to determine the value of b.
Multiplying both sides of the formula by 2, we get;

Dividing both sides by h, we get;

Subtracting both sides of the formula by B, we have;

Thus, the value of b is

Hence, Option D is the correct answer.