Try another version of this question Give the equation in standard form of the ellipse centered at the origin with a focus at `(9,0)`, and a vertex at `(10,0)`.
Get help: Box 1: Enter your answer as an equation. Example: y=3x^2+1, 2+x+y=3
Be sure your variables match those in the question `x^2/100 + y^2/19 = 1`