Answer:
There are 7 parts in all.
9 makes up three of those parts.
9/3=3
3x7=21 vehicles
Step-by-step explanation:
21
1) 3:4=9:12
2) 9+12=21
You didn't ask a question.
D) g(x) = (x + 2)^2 - 1
That would be 3
(4*8)/9
