Cumulative Exam — Cumulative exam Answers

What is the y-value of the vertex of the function f(x)=−(x+8)(x−14)?

Which function has a vertex on the y-axis?

What is the factorization of 81a6 - 100?

Profit is the difference between revenue and cost. The revenue, in dollars, of a company that makes skateboards can be modeled by the polynomial 2x3 + 30x – 130. The cost, in dollars, of producing the skateboards can be modeled by 2x3 – 3x – 520. The variable x represents the number of skateboards sold.

The function f(x) is shown on the graph.