Answer the circle question please.

What number should be added to both sides of the equation to complete this square? x^2-10x=7

What are the sotions to the quadratic equation 9x^2=4

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).