I need help finding the answer

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

Divide. write in the simplest form. 4 1/6 divided by 10

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse