Answer:
5
Step-by-step explanation:

The graph of f(x) is a straight line passing through points (0, -7) and (7, 0)
Answer:
14
Step-by-step explanation:
rectangle 8
triangle 6
Answer:
I= 84
Step-by-step explanation:
for

since D is the rectangle such that 0<x<3 , 0<y<3
