Jana is training for a triathlon that includes a 112 mile bike ride. Today she rode her bike 12 miles in 45 minutes. What is Jana rate in miles per hour

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

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?

The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?