Write a quadratic function f(x) for the area of a rectangle length x+5 width 3x-7

Factor this polynomial completely x^2-64

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Write as a product: ac^2–ad+c^3–cd–bc^2+bd