find the area with side lengths x when x i equal to the given value . are the area of a square and the length of its side directly proportional x=3 in

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Solve the system of equations y= 3/2 - 1, -x+ y =-3