Question 31750
x^2+y^2=64..................I
x+y=8 ....Y=8-X
SUBSTITUTING IN EQN.I
X^2+(8-X)^2=64
X^2+64+X^2-16X=64
2X^2-16X=0
2X(X-8)=0
X=0 OR 8
SO Y=8 OR 0
B IS THE ANSWER