What is 3/5 of 2/3 you can answer i know the answer but i wanted to give free points

You work for a lender that requires a 20% down payment and uses the standard depth to income ratio to determine a person‘s a little eligibility for a home loan of the following choose the person that you would rate the highest on their eligibility for a home loan

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Which value would be a solution for x in the inequality 47-4x< 7