Simon's phone plan costs him $27.50 per month plus $0.15 per text message he sends or receives. If Simon wants to spend a maximum of $65 on his monthly phone bill, what is the maximum number of text messages he can send or receive?

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?