You have to isolate the a. Add fifteen to both sides of the equation, so it’s
2a=15-1
Then subtract 15 and 1, so then the quantity is 14
2a=14
Then divide 2 by both sides, and the answer is
a=7
22.065 Explanation: 5x3=15
A=1.5x1.5x3.14
2.25x3.14
7.065
15
——————-
22.065in2
Triangle
Area = 1/2 b * h
Area = 1/2*15 * 9 = 1/2 * 135 = 67.5
Rectangle
Area = b * h
Area = 15 * 4
Area = 60
Trapezoid
Area = (1/2) * (b1 + b2)* h
Area = (1/2) * (15 + 18) * 4
Area = 1/2 * 33 * 4
Area = 66
Total Area
Total Area = 66 + 60 + 67.5 = 193.5 Answer