The telephone company offers two billing plans for local calls. Plan 1 charges ​$24 per month for unlimited calls and Plan 2 charges $17 per month plus ​$0.04 per call.

Question

The telephone company offers two billing plans for local calls. Plan 1 charges ​$24 per month for unlimited calls and Plan 2 charges $17 per month plus ​$0.04 per call.

a. Use an inequality to find the number of monthly calls for which Plan 1 is more economical than Plan 2.

b. Explain the meaning of the answer to part

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a. Let x represent the number of monthly calls. The answer is ____

b.

Answer 1

Let x = number of calls per month

Plan 1 is more economical when 24 < 0.04x + 17

Solve for x.