Question

Which equation represents circle C
options are in the picture

Answer 1

Answer: (x+4)^2 + (y-1)^2 = 162

Step-by-step explanation:

Equation of Circle : (x – h)^2 + (y – k)^2 = r^2

(h, k) is the center of the circle, r is the radius

The center is (-4, 1), plug it in to get:

(x+4)^2 + (y-1)^2 = r^2

To find the radius we can use the distance formula to find the distance between C and P:

Distance Formula: d = $\sqrt{(x_{2} - x_{1})^{2} + (y_{2} - y_{1})^{2}}$

Plug in C: (-4, 1) and P:(5, -8) to get $\sqrt{162}$

So, the equation is:

(x+4)^2 + (y-1)^2 = $\sqrt{162} ^{2}$

(x+4)^2 + (y-1)^2 = 162

Answer 2

Answer:

Hey! this is a hard one...but i could be wrong.....

Step-by-step explanation:

Ok so let's do this together...it can't be A nor B because it DOES NOT =81......  nor =9!!! it can't be D either! because where do we get the 81 from?????? and etc..............and now, B and A it could be both of the answers  you are thinking and i am thinking too! but B and A has the same writing and problem but not the same answer....so let's see this together....B. is (x-4)2 = (y+1)2 = 81 and A. is  (x-4)2 = (y+1)2 = 9...so...when we do that looks like it is not B. either!! Nor A! Nor D....it is *dun dun dun dunnnnnnn*  C!!!!! The answer is C. (x-4)2 + (y +1)2 = 162!!

Hope this helped and sorry it took so long to type!!!!