Which equation finds the value of x in the triangle below?

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Triangles abd and ace are similar right triangles. witch ratio best explains why the slope of ab is the same as the slope of ac?

You work in a hospital that has 9 floors. you need to see 3 patients on each floor. how many patients do you need to see in all?