5. The equation R(x) = -5x² + 15x + 20 models the revenue (profit-costs) of a company in hundreds of thousands of dollars for every thousand units sold. Identify all key characteristics. How many units can the company sell and still make a profit? For the following questions, determine the term and apply it to rewrite the expressions as perfect square binomial that may or may not have a constant added to it. Check that your new expression is equivalent to the original expression: a. x² + 2x + 7 b. x²-10x+8 A sketch of p(x) is shown below. POO An equation for p(x) could be (A) r(x) = (x²-9)(x-2) (B) r(x) = -x³-2x² + 9x + 18 (C) r(x) = (x² +9)(x-2) (D) r(x) = x³ + 2x²-9x-18 Which of the following terms, when added to the given polynomial, will change the end behavior? Circle all that apply: y=-2x7 +5x6-24 (A)-x8 (B)-3x5 (C) 5x7 (D) 1000 (E)-300