b) \( 5^{0}+\frac{1}{3} \cdot\left[\left(3-\frac{1}{5}\right) \cdot 5^{-2}+2 \cdot\left(1-\frac{2}{5}\right)^{3}\right]: \frac{4}{3} \)

16. Determine whether \( f(x)=8 x-1 \) is one-to-one. If it is, find a formula for its inverse.

Cuál es la inversa de la matriz: \( \left[\begin{array}{lll}1 & 2 & 1 \\ 0 & 1 & 0 \\ 2 & 0 & 3\end{array}\right] \) a. \( \left[\begin{array}{ccc}-3 & 6 & 1 \\ 0 & 1 & 0 \\ 2 & 4 & -1\end{array}\right] \) b. \( \left[\begin{array}{ccc}-3 & 0 & 2 \\ 6 & 1 & 4 \\ 1 & 0 & 1\end{array}\right] \) c. \( \left[\begin{array}{ccc}3 & 0 & -2 \\ -6 & 1 & 4 \\ 1 & 0 & 1\end{array}\right] \) d. \( \left[\begin{array}{ccc}3 & -6 & 1 \\ 0 & 1 & 0 \\ -2 & 4 & 1\end{array}\right] \)

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

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

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