Find the domain and range for the following function asap

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

Need showing work for this problem 56.25 ×25.80