Answer:
D
Step-by-step explanation:
R(x) = -x^2+122x+400
Answer:
c
Step-by-step explanation:
she pays a one-time fee of 50, and 15$ per month
1/10 because you will do it 10 times
D = 20 , v = 19
20v + 12d - 6v
= 20 (19) + 12 (20) - 6 (19)
= 380 + 240 - 114
= 620 - 114
= 506
When d = 20 and v = 19
20v + 12d - 6v = 506
