What is the equation of a circle with center (9, -11) and the point (12, -15) on its circumfance

(x - 9)^2 + (y + 11)^2 = 25.

Step-by-step explanation:

First find the radius which is the distance between the center and the point on the circumference:

Radius =  √ [( -15 - (-11))^2 + (12 - 9)^2)]

= √(16 + 9)

= 5.

The equation of a circle can be written as:

(x - h)^2 + (y - k)^2 = r^2  where (h, k) is the centre and r is the radius.

So here we have:

(x - 9)^2 + (y + 11)^2 = 5^2.

i don't have the answer rn but go to math papa. it shows the steps and the answer. hope this : )

step-by-step explanation:

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!