Question

Telephone company offers two billing plans for local calls. Plan 1 charges $22 per month for unlimited calls and Plan 2 charges $17 per month plus $0.05 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 a.

Answer 1

Answer: 22 < 17+0.05x

Step-by-step explanation: $22-$17=$5. If plan two is $17 but asks you to pay an extra 5 cents per call, so, an inequality is 22 < 17+0.05x. This inequality shows that the $22 must be greater than the $17 plus the extra $0.05 per call, where x represents each extra call.