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Mathematics 12 Online
OpenStudy (anonymous):

What is the foci of the ellipse? (x+5)^2/25 + (y-7)^2/144 = 1

OpenStudy (whpalmer4):

Do you know the formula for an ellipse? From that we can get the vertices, and from the vertices the foci.

OpenStudy (anonymous):

Yes the vertices are (-5,19) and (-5,-5)

OpenStudy (anonymous):

I got (-5,7+-√119) for the foci

OpenStudy (whpalmer4):

okay, that would be most excellent :-)

OpenStudy (anonymous):

So that's the foci?

OpenStudy (whpalmer4):

foci is plural for focus, so the grammar isn't quite correct, but the answer is :-)

OpenStudy (anonymous):

Haha okay thank you (:

OpenStudy (whpalmer4):

You don't need our help :-)

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