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Lilmike234

  • one year ago

what is the radius of a circle with the equation x^2+y-3^2 =21

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  1. Ac3
    • one year ago
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    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.

  2. zzr0ck3r
    • one year ago
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    \(x^2+(y-3)^2=21\\ (x+0)^2+(y-3)^2=(\sqrt{21})^2\)

  3. zzr0ck3r
    • one year ago
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    You should be able to complete it from here?

  4. wolf1728
    • one year ago
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    Is that equation written exactly as the problem states or should it be: x^2+(y-3)^2 =21

  5. lilmike234
    • one year ago
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    So my answer is 4.583

  6. zzr0ck3r
    • one year ago
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    How did you get that?

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