My best guess would be d.
Answer:
Step-by-step explanation:
2m^2-m+4m^2+8m combine like terms
6m^2+7m
Answer:
30%
Step-by-step explanation:
Answer:
10y
Step-by-step explanation:
9y is equal to y+y+y+y+y+y+y+y+y.
If you add y to that you get (y+y+y+y+y+y+y+y+y)+y, which is equal to 10y.