Answer
$A=126$
Work Step by Step
We start with the equation for the area of a trapezoid: $A=\frac{h(b_1+b_2)}{2}$
We plug in the values for the bases and the height: $A=\frac{9(12+16)}{2}$
To simplify, we follow the order of operations.
First, we must simplify above the fraction bar.
To do so, first we add inside the parentheses: $A=\frac{9(28)}{2}$
Then, we multiply above the fraction bar: $A=\frac{252}{2}$
Then, we divide: $A=126$
