91Ó°ÊÓ

Find each product.$\mathbf{(}\mathbf{x}\mathbf{+}\mathbf{4}\mathbf{)}\mathbf{(}\mathbf{x}\mathbf{−}\mathbf{1}\mathbf{)}$

A rectangular gift box has dimensions that can be represented as shown in the figure. The volume of the box is 672 cubic inches. Which of the following is not a dimension of the box?

A 6 in.

B 7 in.

C 8 in.

D 12 in.

State whether each sentence is true or false. If false, replace the underlined phrase or expression to make a true sentence.

${\mathit{x}}^{\mathbf{2}}\mathbf{−}\mathbf{12}\mathit{x}\mathbf{+}\mathbf{36}$is an example of a perfect square trinomial.

Factor the polynomial $y^2+\mathbf{9}y+\mathbf{20}$.

$$\begin{gathered} \mathbf{F}\left(y+\mathbf{2}\right)\left(y+\mathbf{10}\right) \\ \mathbf{G}\left(y+\mathbf{4}\right)\left(y+\mathbf{5}\right) \\ \mathbf{H}\left(y+\mathbf{3}\right)\left(y+\mathbf{8}\right) \\ \mathbf{J}\left(y+\mathbf{5}\right)\left(y+\mathbf{2}\right) \end{gathered}$$

State whether each sentence is true or false. If false, replace the underlined phrase or expression to make a true sentence.

$\underset{\mathbf{¯}}{\mathbf{x}\mathbf{−}\mathbf{2}\mathbf{=}\mathbf{0}}$is a quadratic equation.

Which of the following numbers is less than zero?

$$\begin{gathered} \mathbf{A}\mathbf{1}\mathbf{.}\mathbf{03}×{\mathbf{10}}^{−\mathbf{21}} \\ \mathbf{G}\mathbf{7}\mathbf{.}\mathbf{5}\mathbf{×}{\mathbf{10}}^2 \\ \mathbf{H}\mathbf{8}\mathbf{.}\mathbf{21543}\mathbf{×}{\mathbf{10}}^{10} \\ \mathbf{J}\mathbf{none}\mathbf{}\mathbf{of}\mathbf{}\mathbf{the}\mathbf{}\mathbf{above} \end{gathered}$$