Question

find the center and radius of (x+10)^2 +(y-1)^2 = 9

Answer 1

Center: (-10, 1)
Radius: 3

Answer 2

Do you know why?

Answer 3

nope plz explain

Answer 4

brb afk

Answer 5

Formula for a circle: \[(x-h)^{2}+(y-k)^{2}=r ^{2}\]
(h, k)=center
r=radius

Answer 6

wouldn't it be (-10, -1)= center

Answer 7

No because in the formula it is (y-k), in the question it is also (y-1) so the 1 stays positive
the 10 is negative because the formula is (x-h) and the question shows (x+10). Do you understand?

Answer 8

I know it's kind of confusing the way I explained it...

Answer 9

Oh ok i c thx J.L

Answer 10

No problem :) let me know if you need anymore help

Answer 11

it can be made clearer if you rewrite the equation in standard form as follows:\[(x-(-10))^2 +(y-(1))^2 = 3^2\]

Answer 12

OK THX :D

Answer 13

thx too asnaseer

Answer 14

yw :)