Your cell phone plan costs $39.99 per month plus $.15 for each text message you send or receive. you have at most $45 to spend on your cell phone bill. what is the maximum number of text messages that you can send or receive next month?
-what information do you know? what information do you need?
-what inequality can you use to find the maximum number of text messages that you can send or receive?
-what are the solutions of the inequality? are they reasonable?