Question

A telephone call costs c cents for the first 3 minutes and m cents for each additional minute. Which expression represents the cost, in cents, of a 6-minute call?

Answer 1

Answer:
`c+3m`

Explanation:

Given

A telephone call costs c cents for first 3 minutes and m cents for each additional minute.

Any call beyond 3 minutes costs

`\Rightarrow c+mt`

where t is the minutes spent beyond 3 minutes

For 6 minutes , t is 3

thus, it can be written

`\Rightarrow c+3m`