Derive the equation for the ellipse centered at the origin with foci (0, ±2c) and vertices (0, ±2a).

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.

If there is 20 dogs in the shelter and 5 dogs get homes, and then 43 more dogs come. how many dogs are there in the shelter?

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]