Ricardo has r minutes left on his cell-phone card. He wants to call his friend and still have 8 minutes left over to make calls later. Which expression describes the length of time he can talk to his friend? A. 8 – r
B. 8r
C. r + 8
D. r – 8

I would go with r - 8

Step-by-step explanation:

D

Step-by-step explanation:

if you subtract r by 8 then you will get the remaining minutes left on ricardo's cellphone card. Lets say r=20 so, 20-8=12. therefore, Ricardo would be able to call his friend for 12 minutes. hope this helped

a

step-by-step explanation: