The center of a circle is at (−3, 1) and its radius is 9. what is the equation of the circle? (x+3)2+(y−1)2=18 (x−3)2+(y+1)2=18 (x−3)2+(y+1)2=81 (x+3)2+(y−1)2=81

The standard form of the circle equation is in the form with the center being at the point and the radius being "r".

We have to find the equation of circle with center (-3,1) and radius as 9.

So, h= -3, k=1 and r=9

Equation of circle is:

is the required equation of the circle.

Therefore, Option 4 is the correct answer.

the answer is 844

step-by-step explanation:

it is 844 because if you add 836.50 + 7.5 you will get 844

the answer is a

step-by-step explanation: