Could someone answer all 3 questions?

The solution set for 5v2 – 125 = 0 is

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

Which angle of rotation is an angle of rotational symmetry for all figures?