Use the percent equation to solve: what percent of 12 is 9?

What is the 12th term of b(n)=-4-2(n-1)

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

Use the distance formula to find the distance between (-3,5) and (3,1)