Given f-1(x)=-34x+2, which equation represents f(x)?

Can someone me out here number 4 plz

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5

Pamela has a 30-year, 5.75% mortgage on her $250,000 home. she has been paying on it for 5 years, and has recently hit some financial trouble. if her lender agreed to lower the interest rate on her $231,905.47 balance to 5.5%, what will her new payment be for the remainder of the loan?