Lilmike234
  • Lilmike234
what is the radius of a circle with the equation x^2+y-3^2 =21
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Ac3
  • Ac3
The formula for a circle is x^2+y^2=r^2, therefore it's already set up for you. Not it's not 21 Here I'm gonna go with the sqrt(21) for the radius. Unless 21 is supposed to be squared in that case it's just 21.
zzr0ck3r
  • zzr0ck3r
\(x^2+(y-3)^2=21\\ (x+0)^2+(y-3)^2=(\sqrt{21})^2\)
zzr0ck3r
  • zzr0ck3r
You should be able to complete it from here?

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wolf1728
  • wolf1728
Is that equation written exactly as the problem states or should it be: x^2+(y-3)^2 =21
Lilmike234
  • Lilmike234
So my answer is 4.583
zzr0ck3r
  • zzr0ck3r
How did you get that?

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