?

Free Version
Easy

Finding the Sum of Information of the Given Circle

GEOM-SZD3HO

Given the equation of the circle ${ (x-2) }^{ 2 }+{ (y+7 })^{ 2 }=81$, find the sum of the $x$-coordinate of the center, the $y$-coordinate of the center, and the $radius$ of the circle.