Multiplying Monomials and Binomials Answers

What is the additive inverse of the polynomial –9xy2 + 6x2y – 5x3?

What is the sum of the polynomials?(–x2 + 9) + (–3x2 – 11x + 4)

Which is true about the completely simplified difference of the polynomials a3b + 9a2b2 − 4ab5 and a3b − 3a2b2 + ab5?

What is the difference of the two polynomials?(9x2 + 8x) – (2x2 + 3x)

Profit is the difference between revenue and cost. The revenue, in dollars, of a company that manufactures cell phones can be modeled by the polynomial 2x2 + 55x + 10. The cost, in dollars, of producing the cell phones can be modeled by 2x2 – 15x – 40. The variable x represents the number of cell phones sold.