\begin{tabular}{l} Which of these systems of equations have a solution of \( (-2,4) \) ? Select all that apply, \\ \begin{tabular}{|l|l|}\hline \( 10 x-y=16 \) & \( x-y=-6 \) \\ \( 5 x+y=-6 \) & \\ \( 4 x+2 y=16 \)\end{tabular} \\ \hline \begin{tabular}{l|l}\( y=x+6 \) \\ \( y=-x-6 \)\end{tabular} \\ \begin{tabular}{l|l}\( x+y=2 \) \\ \( y=2 x+8 \)\end{tabular} \\ \hline\end{tabular}

\begin{tabular}{|l|l|l|l|}\hline listen \\ \hline\end{tabular} There are no more than 20 children in the daycare at any given time. Which inequalty represents this situation?

b) \( y=2 x-\frac{1}{2} \)

\begin{tabular}{|l|l|}\hline 4) Listen \\ The width of the dollhouse is smaller than 13 inches. Which inequality represents this situation? \end{tabular}

\( \begin{array}{r}3 x+5 y=5 \\ -2 x-8 y=6\end{array} \longrightarrow \times \begin{array}{r}6 x+10 y=10 \\ \times 3 \\ +6 x-24 y=18\end{array} \) (4) Solve the system of equations. (4) The solution is \( (\square, ?) \)

Find the determinant of the matrix. \( \operatorname{det}\left[\begin{array}{ccc}3 & -10 & 6 \\ 0 & -6 & -1 \\ 0 & 0 & -10\end{array}\right]=\square \)