5x+6=-4 it is quadratic?

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee