MATH :DD

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Mr. Keskin and his wife have a cell phone plan that charges them $5 for 200 text messages per month for each of their phones. The Keskins are charged an additional $0.12 for each text message over their 200-text-message limit. Their carrier has offered them unlimited text messages for both lines for $30. What is the maximum number of text messages that they can send in a month to keep their current plan as the better deal? What is the minimum?

  • MATH :DD -

    2(5+.12(m-200)) < 30

    minimum? 0 of course.

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