Answer:
Step-by-step explanation:
The area of a trapezoid of parallel sides of different lengths a and b and height h is
A = (average of side lengths)(height)
Here, that would be:
10x - 2 + 16x + 10
A = -------------------------- * (10x + 9)
2
Simplifying this expression, we obtain:
26x + 8
A = -------------- (10x + 9), or A = (13x + 4)(10x + 9)
2
If we choose to complete the multiplication, we obtain:
A = 130x^2 + 117x + 40x + 36, or
A = 130x^2 + 157x + 36
