Question

Your cellphone company charges a $18 monthly fee, plus $0.11 per minute of talk time. One month your cell phone bill was $70.80. How many minutes did you spend talking on the phone that month?

Answer 1

480 minutes

Explanation:

We can write this relationship as
`y=0.11x+18` and then solve for x when y=70.80:

`y=0.11x+18\\\\70.80=0.11x+18\\\\52.80=0.11x\\\\480=x`

Therefore, you spent 480 minutes talking.

Answer 2

480 minutes would be the answer

Explanation: