Yefim S. answered • 08/01/21

Math Tutor with Experience

C_{1}(x) = 23 + 0.11x; C_{2}(x) = 0.15x;

C_{1}(x) = C_{2}(x); 23 + 0.11x = 0.15x; 0.04x = 23; x = 575 minutes

Dfghgrter E.

asked • 07/31/21Customers of a phone company can choose between two service plans for long distance calls. The first plan has a $23 monthly fee and charges an additional $0.11 for each minute of calls. The second plan has no monthly fee but charges $0.15 for each minute of calls. For how many minutes of calls will the costs of the two plans be equal?

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Yefim S. answered • 08/01/21

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Math Tutor with Experience

C_{1}(x) = 23 + 0.11x; C_{2}(x) = 0.15x;

C_{1}(x) = C_{2}(x); 23 + 0.11x = 0.15x; 0.04x = 23; x = 575 minutes

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