Answer:
C = $60
Explanation:
To calculate monthly charges, a cellphone provider uses the equation: C = 0.25m + 60, with C being dollars and m representing minutes used beyond the ones provided by the plan. Assuming the plan allowed for 60 minutes, what would the charge be for a client that used 55 minutes? Put your answer in terms of dollars.
The customer used 55 minutes and did not max out the phone plan, and therefore does not pay any over charges of m.
C = 0.25m + 60 when m = 0
C = 0.25m + 60
C = 0.25(0) + 60
C = 0 + 60
C = $60