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OpenStudy (anonymous):
consider the ellipse with equation 25x^2 + 16y^2 = 400. then rewrite this equation in standard form.
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OpenStudy (anonymous):
divide both sides by 25 & by 16: x^2/(4^2) +y^2/ (5^2) = 1
OpenStudy (anonymous):
where does the 400 go?
OpenStudy (anonymous):
nevermind... haha. what scale change maps the unit circle to this ellipse?
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