Which expression is equivalent to 5 (a + b)

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

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Drag the tiles to the boxes to form correct pairs. not all tiles will be used. match each set of vertices with the type of quadrilateral they form