NEED HELP DUE TODAY!!

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

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180