Which expression is equivalent to 1/2w - 4

If f(x)= 3x+6 which of the following is the inverse of f(x)

What is the greater volume 72 quarts or 23 gallons

If you can solve all of these i will give ! - 4% of 190 - 4% of 162.5 - 4% of 140 - a 4% increase from 155.1 - a 4% increase from 159.8