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Find the radius of the circle whose equation is 3x² + 3y² = 75.
A.) 5
B.) 5√3
C.) 5,625

Respuesta :

gmany

Answer:

A) 5

Step-by-step explanation:

The equation of a circle:

[tex](x-h)^2+(y-k)^2=r^2[/tex]

(h, k) - center

r - radius

We have the equation:

[tex]3x^2+3y^2=75[/tex]             divide both sides by 3

[tex]x^2+y^2=25\to r^2=25\to r=\sqrt{25}\to r=5[/tex]

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