Homework Help: math

Posted by Anonymous on Monday, September 7, 2009 at 10:01pm.

What is the equation of a circle with its center at (0,3) and a diameter of 6.
Answers:
a. x^2+(y+3)^2=9
b. x^2-(y-3)^2=9
c. x^2+y^2-6y=0
d. x^2+(y_3)^2=0
e. x^2+(y-3)^2=36

math - MathMate, Monday, September 7, 2009 at 10:26pm
If we know that the equation of a circle with the centre at (x0,y0) and radius r:
(x-x0)² + (y-y0)² = r²
Which choice would you take?
math - Anonymous, Monday, September 7, 2009 at 10:36pm
I think it's b.
math - Anonymous, Monday, September 7, 2009 at 10:38pm
I think it's b.
math - MathMate, Tuesday, September 8, 2009 at 8:12am
b. is correct!

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