SOLUTION: I'm just learning how to graph circles, and I was wondering if you guys can help with that. I am in eighth grade. One of my homework problems was to solve this system of equations

Algebra ->  Circles -> SOLUTION: I'm just learning how to graph circles, and I was wondering if you guys can help with that. I am in eighth grade. One of my homework problems was to solve this system of equations       Log On


   

Question 920780: I'm just learning how to graph circles, and I was wondering if you guys can help with that. I am in eighth grade. One of my homework problems was to solve this system of equations
+x%5E2+%2B+y%5E2+=+9+
y = 2x
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
x^2 + (2x)^2 = 9
x^2 + 4x^2 = 9
5x^2=9
x^2=9/5
x = -3/sqrt(5)
x = +3/sqrt(5)


now plug in those for x and find y
y = 2x