You could rent cell phones for you overseas travel.

Question

If you are in Paris, the cost for a 1 week rental, building 50 min of long-distance calls to New York, the rental fee, and $4 for each airtime minute, was $240.

A. find a formula for the total cost C (in dollars) of a rental phone that includes m min of long-distance calls to New York. 

C(m) = _________

B. What is the weekly rental fee for the phone?

$ __________.

Answer 1

C(m) = r + 4m

240 = r + 4(50)

 

Can you solve for r and answer?