PLS HELP ME THIS IS DUE TOMMOROW

Use set buikder notation to represent the following set: {, -2, -1, 0}

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

Val and tony get paid per project. val is paid a project fee of $44 plus $12 per hour. tony is paid a project fee of $35 plus $15 per hour. write an expression to represent how much a company will pay to hire both to work the same number of hours on a project.