Posted by **Priscilla** on Sunday, June 8, 2014 at 12:30am.

You have a wireless phone plan that costs $25 per month. You must also pay $.10 per minute for each minute over 500 min. you phone bill was more than $30 last month. Write an inequality to represent the number of minutes m you spent on the phone last month. Suppose you use 525 min next month. How much will your bill be?

- Math -
**Reiny**, Sunday, June 8, 2014 at 8:26am
The equation for your cost:

cost = .1(m-500) + 25 , where m is in minutes

so :

.1(m-500) + 25 > 30

For the second part, m = 525

cost = .1(525-500) + 25

= $27.50

- Math -
**Anonymous**, Thursday, October 22, 2015 at 8:11pm
Thanks so much for this equation it really helped me!!!!!!

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