Factor the following polynomial completely.

-x 2 y 2 + x 4 + 4y 2 - 4x 2

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Graph y = -|x| + 2. click on the graph until the correct one appears.

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?