# algebra

posted by .

find center and radius of circle

(x-6)^2+(y+9)^2=121
-(x-6)^2 -(x-6)^2
(y+9)^2=121-121-(x-6)^2
(y+9)^2=+/- ã121-(x-6)^2
-9 -9
y=-9+/-ã121-(x-6)^2
does anyone know is this the answer or do I go further???????????????????????

• algebra -

(x-h)^2 + (y-k)^2 = r^2
where (h,k) is the centre and the radius is r

so for (x-6)^2+(y+9)^2=121
the centre is (6,-9) and the radius is 11

I have no clue what you were trying to do in your solution
.
Also this is the third student who has statements like your
-9 -9
in a sequential solution.

What is that supposed to mean?
Are you all from the same class?

• algebra -

I know Lori. We are suppose to show the number we left out or took away.

• algebra -

Where are they showing you that way?

Tell me the city or state or province, don't name the school

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