Evaluate f(x)-g(x) when f(x)=4x-1 and g(x)= -3x 2

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?

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

Using inductive reasoning, what are the next two number in this set? 2,3/2,4/3,5/4,