need help wit this math problem

Question

Troy signed up for a new cell phone plan which charges him a fee of $40 per month, plus $0.05 for each text message ( t) that he sends. If Troy wants to spend at most $70 on his cell phone bill this month, which inequality below can be used to determine the number of text messages that he can send?

Answer 1

Let t = # of text messages

Flat fee + texting fee≤70

40+0.05t≤70