anonymous
  • anonymous
Which is an equation of the circle with a radius of 9 units and center at (–4, 2)? (x − 9)2 + (y + 4)2 = 4 (x − 4)2 + (y + 2)2 = 81 (x + 4)2 + (y − 2)2 = 81 (x − 2)2 + (y + 4)2 = 81
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@Teddyiswatshecallsme do you know this?
anonymous
  • anonymous
Equation of a circle: \[(x - h)^2 + (y - k)^2 = r^2\]
anonymous
  • anonymous
h and k represent the x and y coordinates of the center of the circle

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anonymous
  • anonymous
r represents the radius
anonymous
  • anonymous
The center is (–4, 2) and h represents -4 and k represents 2. 9 is the radius of the circle and we have to square that = 81.
anonymous
  • anonymous
okay that makes sense. i just googled it after awhile
anonymous
  • anonymous
Okay so now plug those values into the original formula of the circle
anonymous
  • anonymous
(x+4)^2 +(y-2)^2 = 81
anonymous
  • anonymous
Correct :)
anonymous
  • anonymous
So what answer should that be?
anonymous
  • anonymous
c
anonymous
  • anonymous
Yup
anonymous
  • anonymous
could you help me with another one?
anonymous
  • anonymous
Sure. Just post it separately
anonymous
  • anonymous
okay

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