Solve by using substitution: y=6x+1
y=-2+6x
(Please show your work, I really don't understand this!)

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?

Simplify the following expression 48^1/2

Ineed on this question me get the answer