Answer:
12r^2 +r -7
Step-by-step explanation:
9r^2 +4r -7 +3r^2 -3r
Combine like terms
9r^2 +3r^2 +4r -3r -7
1. k = 15
2. d = 20
3. n = 3
Slope =
2x(3x-2)
