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anonymous
 5 years ago
Find the vertices, foci and eccentricity of the ellipse.
9x^2 + y^2 = 81
anonymous
 5 years ago
Find the vertices, foci and eccentricity of the ellipse. 9x^2 + y^2 = 81

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Rewrite it in standard form.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You don't need me when you have polpak :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[\frac{(xh)^2}{a^2} + \frac{(yk)^2}{b^2} = 1\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You should divide both sides by 81, you will have: \[{x^2 \over 9}+{y^2 \over 81}=1\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Then rewrite 9 and 81 as the square of a and b, then you know the lengths of the major and minor axes.
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