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3x^2 + 3y^2 = 75

Divide both sides by '3'

Hence

x^2 + y^2 = 25

x^2 + y^2 = 5^2

In the Pythagorean Geometry

The circle equation is

x^32 + y^2 = r^2

Hence 5^2 = r^2

Hence r = 5 (The radius)

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lenpollock

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1y ago
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9y ago

3x² + 3y² = 75

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Q: What is the radius of the circle whose equation is 3x² plus 3y² equals 75?
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