Cumulative Exam — Cumulative exam Answers

The monomial 36x4 is a perfect square. What is the square root of 36x4?

Which function has real zeros at x = –8 and x = 5?

Which expression is equivalent to 7a2b + 10a2b2 + 14a2b3?

What is the axis of symmetry of h(x) = –2x2 + 12x – 3?

A road is made in such a way that the center of the road is higher off the ground than the sides of the road, in order to allow rainwater to drain. A cross-section of the road can be represented on a graph using the function f(x) = (x – 16)(x + 16), where x represents the distance from the center of the road, in feet. Rounded to the nearest tenth, what is the maximum height of the road, in feet?

Which is the solution of the quadratic equation (4y – 3)2 = 72?

Shayna enlarged a square photo by adding 10 inches to each side so it could be seen on a large poster. The area of the enlarged photo is 256 square inches. In the equation (x + 10)2 = 256, x represents the side measure of the original square photo.

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.

What is the factorization of 121b4 − 49?

What is the product?