Tanya's mother will pay for tanya's entire cell phone bill as log as the usage charge is less than $35 for the month. On tanya's cell phone plan, the usage charge is $0.15 per text message and $0.10 per minute for calls.

Write an inequality that expresses the number of text messages Tanya may send, t, and the number of minutes Tanya may talk, m, so that her mother will pay the entire cell phone bill for the month.