Answer:
-7 + 10.5m - 2.5n
Step-by-step explanation:
To simplify this, we have to first simplify -3.5(2-3m) into -7 + 10.5m.
Now, subtract 2.5n to get -7 + 10.5m - 2.5n.
Area = 31.5 units^2
7 x 3 = 21
Area of triangle is (height x base) / 2
(3 x 7) / 2 = 10.5
21 + 10.5 = 31.5
