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Find the Foci and directrices

The equation4x^2 +9y^2 -36 = 0 represents an ellipse in standard position. Find the coordinates of the foci and the equations of
1. 1 answer
2. asked by s17
3. 517 views
Find the foci and directrices of the following parabola:(a) y^2=8x (b) y^2=24x (c) x^2=12y (d) x^2=5y
1. 1 answer
2. asked by Ande
3. 430 views
Find the Foci and directrices of the following parabola of the pattern:y^2=8x at (2,4) y^2=24x at (5/2, 6) x^2=12y at (6, 3)
1. 1 answer
2. asked by Ande
3. 337 views
Find the foci of the ellipse with the equation (16x^2) + (49y^2) = 784 algebraically. Do not round. Find the correct ordered
1. 1 answer
2. asked by 31
3. 123 views
how to find the equation of a parabola given foci(-7,-17), (-7,17),the absolute value of the difference of the distances of any
1. 1 answer
2. asked by Moana
3. 2,103 views
Find the foci of the ellipse with the equation (16x^2) + (49y^2) = 784 algebraically. Do not round. Find the correct ordered
1. 3 answers
2. asked by 31
3. 146 views
Convert into standard form. Find any centres, vertices, foci, asymptotes, directices and axes of symmetry.64x^2-36y^2-512x-216y=
1. 3 answers
2. asked by Jen
3. 875 views
Given that the ellipse x^2/a^2 + y^2/b^2 =1 has foci at(+/-ae,0)where e is the eccentricity and b^2=a^2(1-e^2),find the
1. 1 answer
2. asked by muzungu
3. 538 views
Choose the equation that best represents an ellipse for the given foci and co-vertices.1. foci (+-2, 0) co-vertices (0, +-4) 2.
1. 2 answers
2. asked by Karen
3. 922 views
For the ellipse with equation 5x^2+64y^2+30x+128y-211=0, find the cooridinates of the center, foci, and vertices. Then, graph
1. 2 answers
2. asked by Mary
3. 784 views