Question

Customers of a phone company can choose between two service plans for long distance calls. The first plan has no monthly fee but charges $0.15 for each minute of calls. The second plan has a $17 monthly fee and charges an additional $0.11 for each minute of calls. For how many minutes of calls will the costs of the two plans be equal?

Answer 1

I believe that it is 425 minutes because 17+(.11×425) is 63.75 and so is .15×425.