Question

A circle is centered at (5, −9) and has a radius of 12. Which of the following is the equation for this circle?

(x-5)^2+(y+9)^2=12
(x-5)^2+(y+9)^2=144
(x+5)^2+(y-9)^2=144
(x+5)^2+(y-9)^2=12

Answer 1

The equation of this circle is (x-h)^2 + (y-k)^2= r^2

Plug the values in and boom

Answer 2

im still confused ): ?? /: @willet

Answer 3

Okay, in this case, 5 is h and -9 is k and 12 is r

Answer 4

If you input those value into that equation and simplify, you should get your answer

Answer 5

so then the answer would be A? @Ryan361

Answer 6

Well, you have r^2 so it would be 12^2 which is 144

Answer 7

other than that you are right

Answer 8

actually i wrote the question wrong. its D

Answer 9

I meant i wrote the answers wrong

Answer 10

i corrected them. so my answer is D ? @Ryan361

Answer 11

I'm getting B

Answer 12

But the 5 isnt a negative ... @Ryan361 only the 9 is

Answer 13

The equation you put the numbers into makes it negative

Answer 14

(x-h)^2 + (y-k)^2= r^2

It's "x-h" h is 5.

so, x-5

Answer 15

ohh ok thank you!!! (((((:::: @Ryan361

Answer 16

You're welcome

Answer 17

can you help me with one more ? @Ryan361

Answer 18

You just gotta be careful with signs, it's really easy to accidentally do make a mistake

Answer 19

Yea, I can try depends on what it is

Answer 20

What step is needed when constructing a circle circumscribed about a triangle? (1 point)
Select one:
a. Construct the angle bisectors of each angle in the triangle.
b. Construct the perpendicular bisectors of each side of the triangle.
c. Construct the midpoints of each side of the triangle.
d. Construct the altitude of each angle in the triangle.
@Ryan361

Answer 21

@sleepyhead314

Answer 22

I'm pretty sure it's B

Answer 23

http://www.mathsisfun.com/geometry/construct-trianglecircum.html

Answer 24

yes i agree thankssss @Ryan361

Answer 25

Welcome