unit test review

What is the product? (9t-4)(-9t-4)

-81r2+16

Mrs. Ishimitsu is installing a rubber bumper around the edge of her coffee table. The dimensions of the rectangular table are (2x2 - 16) feet and (-x2 + 4x + 1) feet. Which expression represents the total perimeter of the table, and if x = 3, what is the length of the entire rubber bumper?

2x2 + 8x - 30; 12 feet

What is the product? (x+3)(2x-1)

2x2+5x-3

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. What expression represents the profit?

33x + 390

Which is equivalent to (-2m+5n)2, and what type of special product is it?

4m2-20mn+25n2; a perfect square trinomial

What is the difference of the two polynomials? (7y2 + 6xy) - (-2xy + 3)

7y2 + 8xy - 3

Armando used algebra tiles to represent the product . 3x(2x-1) Which is true regarding Armando's use of algebra tiles?

Some of the products do not show the correct powers of x.

Which is true about the completely simplified difference of the polynomials 6x6 − x3y4 − 5xy5 and 4x5y + 2x3y4 + 5xy5?

The difference has 4 terms and a degree of 7.