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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?
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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?

User Jasonwarford
by
3.0k points

2 Answers

3 votes

Answer:

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.

User Brandon Ling
by
2.9k points
12 votes

Answer:

480 minutes would be the answer

Explanation:

User Satvinder Singh
by
2.8k points
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