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
7th Grade ELAR Snapshot
y = -2x - 5
2y = x - 3
y = 1/2x - 3/2
gradient = 1/2
perpendicular gradient = negative reciprocal = -2
y = -2x + c
(-3) = -2(-1) + c
-3 = 2 + c
-5 = c
