\begin{tabular}{|l|}\hline Directions: \( \frac{\text { Solve each proportion. }}{16}=\frac{x}{12} \) \\ \hline\end{tabular}

Factor completely. \[ 5 v^{2}-30 v+70 \]

15. Solve: \( |5 x+1|-9=-4 \)

\( \left.\begin{array}{l}1 \leftarrow \quad \begin{array}{l}\text { Write the augmented matrix for the system of linear equations. } \\ \begin{array}{rl}9 x+y+5 z & =5 \\ 7 x-3 y-z & =9 \\ x-6 y-5 z & =-4\end{array} \\ \text { Enter the augmented matrix. } \\ \square \square \square \square \square \square \square\end{array} \\ \square \square \square \square\end{array}\right] \)

Find the least common denominator of \( \frac{2}{x-6} \) and \( \frac{7}{x+6} \)

1) A picture should be centered on a wall. The picture is 3 feet wide. The wall is 15 feet wide. How much space should be on the left \( (x) \) and right \( (x) \) of the picture? \( x+3+x=15 \) \( 2 x+3=15 \) What is the value of \( x \) ?