Emmas phone plan

Question

Emma is very shy. Her friends are concerned that texting only will further increase

her shyness. They encourage her to consider a plan with a talk option instead of

texting only. Suppose Emma takes their advice and decides to use only the talking

features of Plan A and not send any text messages.

a. Write an equation for the cost, C, of talking m minutes.

b. How much will it cost Emma to talk for 30 minutes?

c. If Emma has $10, how many minutes can she talk?

Plan B  Flat fee of $22.00 per month, plus  $0.07 per text sent  $0.07 per minute per call

Answer 1

a. C = 22 + 0.07m

b. C = 22 + 0.07(30)

c. She cannot. She hasn't enought to pay the monthly fee.