contestada

Your cell phone plan costs $39.99 per month plus $0.13 for each text message you send or receive. You have at most $44 yo spend on your cell phone bill. What is the maximum number of text messages that you can send or receive next month?

Respuesta :

39.99 + 0.13m < = 44
0.13m < = 44 - 39.99
0.13m < = 4.01
m < = 4.01 / 0.13
m < = 30.84......so the most that he can send or receive is 30