Simplify the expression below. 5xy2 - 3x + 2y2 + 7x + 13xy2

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39