A circle with center on (7,0) with a radius of 9.

The answer to your question is (x - 7) ² + y² = 81

Step-by-step explanation:

Data

Center = (7, 0)

radius = 9

Process

To find the standard equation of a circle, just substitute the values of the center and the radius.

Standar equation of a circle

(x - h) ² + (y - k) ² = r²

-Identify the values of h and k

h = 7 k = 0 and r = 9

-Substitution

(x - 7) ² + (y - 0) ² = 9²

-Simplification

(x - 7) ² + y² = 81