First Two Games of the Season A) $\left[ \begin{array} { l l } 5 & 62 \end{array} \right]$

first two games of the season. Write a matrix containing the total number of points and rebounds for each of the starting
five.
$$\begin{array}{l}\begin{array} { l | c | c } \text { Game } 1 & \text { Points } & \text { Rebounds } \\\hline \text { Levy } & 20 & 3 \\\text { Cowens } & 16 & 5 \\\text { Williams } & 8 & 12 \\\text { Miller } & 6 & 11 \\\text { Jenkins } & 10 & 2\end{array}\\\\\begin{array} { l | c | c } \text { Game } 2 & \text { Points } & \text { Rebounds } \\\hline \text { Levy } & 18 & 4 \\\text { Cowens } & 14 & 3 \\\text { Williams } & 12 & 9 \\\text { Miller } & 4 & 10 \\\text { Jenkins } & 10 & 3\end{array}\end{array}$$

A) $\left[ \begin{array} { l l } 5 & 62 \end{array} \right]$
В) $\left[ \begin{array} { r r } 7 & 38 \\ 30 & 8 \\ 21 & 20 \\ 21 & 10 \\ 5 & 20 \end{array} \right]$
C) $\left[ \begin{array} { r r } 38 & 7 \\ 30 & 8 \\ 20 & 21 \\ 10 & 21 \\ 20 & 5 \end{array} \right]$
D) $[ 625 ]$ Answer: C
-Conrad and Dobler are the two top salesmen in an office that sells personal computers and security systems. The tables below show their sales figures for July and August. $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$$\text { July Sales (\$) }$
$\begin{array}{c|l|l} & \begin{array}{l}\text { Personal } \\\text { Computer }\end{array} & \begin{array}{l}\text { Security } \\\text { System }\end{array} \\\hline \text { Conrad } & 25,000 & 44,000 \\\text { Dobler } & 14,000 & 21,000\end{array}$

$\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\text { August Sales (\$) }$
$\begin{array}{l|l|l} & \begin{array}{l}\text { Personal } \\\text { Computers }\end{array} & \begin{array}{l}\text { Security } \\\text { Systems }\end{array} \\\hline \text { Conrad } & 22,000 & 45,000 \\\text { Dobler } & 18,000 & 27,000\end{array}$


Write the matrix which shows the increase (decrease) in sales from July to August.

A) $[ 7000 - 7000 ]$
B) $[ - 70007000 ]$
C) $\left[ \begin{array} { r r } - 3000 & 1000 \\ 4000 & 6000 \end{array} \right]$
D) $\left[ \begin{array} { r r } 3000 & - 1000 \\ - 4000 & - 6000 \end{array} \right]$