If 3x+y=40, 2x-y=20, for integers of x and y, y^2=? Select.
A) 2
B) 4
C) 0
D) 16
E) 3
3x+y = 40   2x-y = 20   5x = 60   x = 12   y = 4   y^2 = 16   Answer is 16
<result>D</result>
If 3x+y=40, 2x-y=20, for integers of x and y, y^2=?