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}

\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]

\left[ \begin{array} { r r } 38 & 7 \\ 30 & 8 \\ 20 & 21 \\ 10 & 21 \\ 20 & 5 \end{array} \right]

[ 625 ]

Answer: C
-The tables below show the times by three runners in two heats of a race. Write a matrix that shows the increase (decrease) in each time from the first heat to the second.

\begin{array}{l|l}\text { Heat 1 } & \begin{array}{l}\text { Time } \\\text { (sec.) }\end{array} \\\hline \text { Russell } & 15.5 \\\text { Sergy } & 15.8 \\\text { Omar } & 162\end{array}

\begin{array}{l|l}\text { Heat } 2 & \begin{array}{l}\text { Time } \\(\mathrm{sec})\end{array} \\\hline \text { Russell } & 15.3 \\\text { Sergy } & 15.4 \\\text { Omar } & 15.7\end{array}

\left[ \begin{array} { l l } 150 & 15.8 \\ 15 & 16.2 \\ 15.5 & 15.3 \end{array} \right]

\left[ \begin{array} { l } - 0.2 \\ - 0.4 \\ - 0.3 \end{array} \right]

\left[ \begin{array} { r } - 0.2 \\ - 0.4 \\ 0.5 \end{array} \right]

\left[ \begin{array} { l } - 0.2 \\ - 0.4 \\ - 0.5 \end{array} \right]

{6y+w=−25x+y+4z−w=146x+z+4w=6x+y+4z=13\left\{ \begin{aligned}6 y + w & = - 25 \\x + y + 4 z - w & = 14 \\6 x + z + 4 w & = 6 \\x + y + 4 z & = 13\end{aligned} \right.⎩⎨⎧​6y+wx+y+4z−w6x+z+4wx+y+4z​=−25=14=6=13​

Multiple Choice

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$\left\{ \begin{aligned}6 y + w & = - 25 \\x + y + 4 z - w & = 14 \\6 x + z + 4 w & = 6 \\x + y + 4 z & = 13\end{aligned} \right.$

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