Express the ratio of the area of the circle to the area of the square

π/4

Step-by-step explanation:

The area of the circle is A = π(2x)^2 = 4πx².

The length of one side of the square is 2(2x), or 4x, so the area of the square is A = 16x².

The ratio of the area of the circle to the area of the square is

              4πx²

ratio =   and this reduces to ratio = π/4.

              16x²

x+y=90

x=30-y=x

step-by-step explanation:

if you understand you will get the answer