How are you guys day going?

Complete the statements about the system of linear equation respresented by the tables the equation respented the left table is

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 center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?