SOLUTION: Help? I'm studying for my finals but I just don't understand these questions. Or how to find the answer. PLEASE HELP! Given x^2+y^2-12x-8y+27=0 What is it's center? For rad

Question 616013: Help?
I'm studying for my finals but I just don't understand these questions. Or how to find the answer. PLEASE HELP!
Given
x^2+y^2-12x-8y+27=0
What is it's center?
For radius: I got sqrt.27 = 5.196 which radius equals 5.

&If given x^2/25+y^2/16=1
What is the foci?
Given 36x^2+9y^2-324=0
Find the
center:
vertices:
co-vertices:
foci: I know it's c^2=a^2+b^2 or subtraction?
These questions I have trouble with on the review, please help!
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
(x-6)^2+(y-4)^2=25
you didn't get radius =5 from your work
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