document.write( "Question 441859: Obtain an equation of the conic descrIbed, Then graph by hand.\r
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Algebra.Com's Answer #305187 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi
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document.write( "Ellipse, foci at (-4,2) and (-4,8), vertex at (-4,10) 
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document.write( "Major axis along x = -4  f = (8-2)/2 = 6/2 = 3 = sqrt(b^2-a^2) C(-4,5) b = 5
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document.write( "                                             3 = sqrt(25-a^2) a^2 = 16
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document.write( "Standard Form of an Equation of an Ellipse is 
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document.write( "where Pt(h,k) is the center and a and b  are the respective vertices distances from center.
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document.write( "  (x+4)^2/16 + (y-5)^2/25 = 1
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document.write( "ewatrrr@aol.com
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document.write( "private/pay tutoring Inquiries only, please. 
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