Consider the system of linear equations \( \begin{array}{l}x+y-z=2 \\ 3 x+2 y-z=-3 \\ -x-y+2 z=-1\end{array} \) Write down the system in matrix form, \( A X=b \) where \( X=\left[\begin{array}{l}x \\ y \\ z\end{array}\right] \) Write down the matrices \( A \) and \( b \) as well as their respective sizes:

If \( 10^{\log x}=10^{18} \), what is the value of \( x ? \) (1 point) 18 \( 10^{18} \) -18 \( 10^{-18} \)

A line that includes the points \( (-8, v) \) and \( (-6,-10) \) has a slope of -8 . What is the value of \( v \) ?

Use the rule \( \log _{b}(x y)=\log _{b} x+\log _{b} y \) to find \( \log _{2}(16 \cdot 64) \). (1 point)

1) \( y=3 x^{2}-2 x-1 \)

Find the slope and \( y \)-intercept of the graph of the equation. \[ y=\frac{2}{5} x-1 \] Slope \( =\square \) (Enter a fully reduced fraction.) The y-intercept is \( \square \). (Simplify your answer. Type an ordered pair.)