Answer
a) $\begin {bmatrix}
6 & -14.2 & -10 \\
\end{bmatrix}$
b) $\begin {bmatrix}
-16.5) & 4.5 \\
0 & -2.25 \\
\end{bmatrix}$
Work Step by Step
a) $-2\begin {bmatrix}
-3 & 7.1 & 5 \\
\end{bmatrix}$
$\begin {bmatrix}
(-2)-3 & (-2)7.1 & (-2)5 \\
\end{bmatrix}$
$\begin {bmatrix}
6 & -14.2 & -10 \\
\end{bmatrix}$
b) $1.5\begin {bmatrix}
-11 & 3 \\
0 & -1.5 \\
\end{bmatrix}$
$\begin {bmatrix}
-11(1.5) & 3(1.5) \\
0(1.5) & -1.5(1.5) \\
\end{bmatrix}$
$\begin {bmatrix}
-16.5 & 4.5 \\
0 & -2.25 \\
\end{bmatrix}$
