Can y’all please help me ..ASAP

Combined megan and kelly worked 60 hours. kelly worked twice as many hours as megan. how many hours did they each worked?

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

Sum is 17 and their difference is 3