Someone please help on this Using f(x)=5x+4 and g(x)=x-3 to complete the compositions

-Find the inverse of f(g(6))
-Find the inverse of g(f(-7))

By adding two hours to 6:30, you get 8:30, then add the remaining 18 minutes to get 8:48 PM.

Then for the second one, subtract 8:30 from 2:00 to get an elapsed time of 6 hours. We check this by adding 6 hours to 2:00, and we see it gets us to 8:30 PM.

:)