Write 171 miles in 3 hours as a unit rate

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?

You want to volunteer for at most 20 hours each month. so far, you have volunteered for 7 hours this month. which inequality represents the number of hours h you can volunteer for the rest of this month? h? 13