Answer:
136
Step-by-step explanation:
2 triangles (front and back): 2 x 1/2 x 6 x 4 = 24
2 rectangles (on both sides) : 2 x 5 x 7 = 70
1 base rectangle: 7 x 6 = 42
total : 24 + 70 + 42 = 136
(f+g)(3) = f(3) + g(3) = 6(3) + 3 + 3 -7 = 18 +6 -7 = 17.
Answer: 17
1/2 m - 3/4 n = 16
1/2 m - 3/4 (8) = 16
1/2 m - 6 = 16
1/2 m = 16 + 6 = 22
m = 2 x 22 = 44