Hi,
Write an equation for each ellipse in standard form.
1.vertices:(4,-7) and (12,-7) co-vertices(8,-10) and (8,-4): C(8,-7)
2.vertices: (0,-7) and (0,7) co- vertices (-4,0) and (4,0):C(0,0)
3.co-vertices (-8,-3) and (-4,-3) foci (-6,-3-squaretoot of 77) and (-6,-3 plus square root of 77)
, a = 9 Vertical Ellipse