4. What is the area of this unknown figure? Show your work.

Answer:
Area of small little rectangle above:
3 x 5 = 15
Let's find the area of the trapezoid now:
5 + 13 = 18
18 x 7( i got 7 from: 10 - 3 = 7) = 126
126 x 1/2 (basically just dividing by 2) = 63
Now let's add all the given areas:
15 + 63 = 78 inches^2 is your answer