Posted by **Sara** on Friday, March 21, 2008 at 6:40pm.

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=+/- 121-(x-6)^2

-9 -9

y=-9+/-121-(x-6)^2

does anyone know is this the answer or do I go further???????????????????????

- algebra -
**Reiny**, Friday, March 21, 2008 at 7:01pm
Your equation is already in the standard form of

(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?

## Answer this Question

## Related Questions

- Algebra - -9+3w/11 divided by 25w-75/121 Do I need a Common denominator? Would ...
- stat - Diana and franklin both play a card game called cribbage,in whichthe ...
- Help - I am trying to do this problem and this is what I have got so far Divide...
- algebra 2 - evaluate if possible 1. square root -121 A not a real number 2. ...
- probability - (a) Find P(121 X 139), the probability that a randomly ...
- Calculus - This is a large problem, sorry for the trouble. if f(x) = sqrt(x^3 + ...
- math.help - am i correct on this radical (-121) the radicand is negative 121 ...
- Geometry - The area of a square is 121 sq feet. What is the length of its sides...
- math (algebra honors) #2 - If the radius of a circle is increased by 6 cm, the ...
- math - What is the square root of 121? show work thanx I memorized this long ago...

More Related Questions