Write an equation for an ellipse centered at the origin, which has foci at (0, V15) and co-vertices at (v21,0).

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?