scoven4307 scoven4307

05-02-2019
Mathematics

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X^2+y^2-4y-15=6
Rewrite the equation of a circle in standard form. State the radius r of the circle.

X2y24y156 Rewrite the equation of a circle in standard form State the radius r of the circle class=

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mathecoach mathecoach

06-02-2019

Answer:

x^2 + y^2 - 4y - 15 = 6

x^2 + y^2 - 4y = 21

x^2 + y^2 - 4y + 4 = 25

x^2 + (y - 2)^2 = 5^2

r = 5

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