Fourteen friends went to the county fair. all except 6 of them bought a hot dog. each hot cost $3.how much did the friends spend on hot dogs.

What is the inverse of the function f(x)=4x+8

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?

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?