Find the equation of a circle in radius center form with

center at (-3,-5) and tangent to the y- axis.

im so confused with how the problem has stated on the centers. i can hardly understand the problem. please help.

Thank you

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- Nov 19th 2012, 05:04 AMrcsequation of the circle
Find the equation of a circle in radius center form with

center at (-3,-5) and tangent to the y- axis.

im so confused with how the problem has stated on the centers. i can hardly understand the problem. please help.

Thank you - Nov 19th 2012, 05:18 AMskeeterRe: equation of the circle
$\displaystyle (x-h)^2+(y-k)^2 = r^2$

where the circle is centered at $\displaystyle (h,k)$ and $\displaystyle r$ is the radius.

now ... what is the distance from (-3,-5) to the y-axis? - Nov 19th 2012, 05:20 AMrcsRe: equation of the circle
i got it...

(x + 3)^2 + (y + 5) = 9

thanks