Reread the essay "School's Out for Summer" by Anna Quindlen to answer these text-dependent questions.

How does the author use the "hook" of the Ad Council's focus groups and slogan to set up her argument about hunger in America?

Lee las descripciones de esta situación en la ciudad y completa la oración.

modelo:

Vas a la galería de arte todas las semanas. (fascinar el arte)

Te fascina el arte.

• Voy al teatro todos los viernes. (fascinar las obras de teatro)

In glycolysis, which reactions involve phosphorylation?

Is liquid bleach an acid or base?

Solve the system using matrices. If there is no solution or if there are infinitely many solutions and a system's equations are dependent, so state.

$$\left\{\begin{array}{rr}x-2 y+z & =4 \\ 5 x-10 y+5 y= & 20 \\ -2 x+4 y-2 z= & -8\end{array}\right.$$

Determine if the statement is true or false, and justify your answer. If $\left\{\mathbf{u}_{1}, \mathbf{u}_{2}, \mathbf{u}_{3}\right\}$ is linearly dependent, then so is $\left\{\mathbf{u}_{1}, \mathbf{u}_{2}, \mathbf{u}_{3}, \mathbf{u}_{4}\right\}$

¿Cuánto tiempo hace que las siguientes personas hacen esta actividad?

modelo:

Susana: saber leer (dos años)

Hace dos años que Susana sabe leer.

• Francisco: estar en Puerto Rico (dos semanas)

Is Be(OH)$_2$ an acid or base?

How do systemic disorders affect nail and hair growth?

Describe how each person, thing, or event affected the United States and/or President George W. Bush's presidency.

Al Gore

Solve each system of equations by the substitution method. Check your solutions. For any dependent equations, write your answer in the ordered pair.

$$\left\{ \begin{array} { r } { 2 x - y = 5 } \\ { - 4 x + 2 y = 7 } \end{array} \right.$$

Simplify each of the given expressions. Write all answers without negative exponents. Assume that all variables represent positive real numbers.

$$\frac{5^{1 / 3} \cdot 5^{1 / 2}}{5^{3 / 2}}$$

Solve the system by graphing, if possible. If a system is inconsistent or if the equations are dependent, state this. (Several coordinates of points of intersection are fractions.)

$$\left\{ \begin{array} { l } { 2 x + 2 y = - 1 } \\ { 3 x + 4 y = 0 } \end{array} \right.$$

For the following LP, x1 and x2 are basic variables in the optimal tableau. Use the formulas of this section to determine the optimal tableau.

$$\begin{array}{c}{\max z=3 x_{1}+x_{2}} \\ {\text { s.t. } \quad 2 x_{1}-x_{2} \leq 2} \\ {-x_{1}+x_{2} \leq 4} \\ {x_{1}, x_{2} \geq 0}\end{array}$$