if the area of a square is 9, then the perimeter of a square is

the answer is 2.25

Area of a square  =   side^2   .....so...

9  =  s^2      take the square root of both sides

3  =  s

Perimeter of a square =  4s

So the perimeter is....

4(3)  =    12

if y=3x and 4x - 2y =5 , then x= ?