Problem:
Find the dot product of the following two vectors:
$\left(
\begin{array}{c}
 -2 \\
 -8 \\
 5 \\
 6 \\
\end{array}
\right)$ and
$\left(
\begin{array}{c}
 4 \\
 -5 \\
 -9 \\
 -3 \\
\end{array}
\right)$.
Answer:
$-31$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/dot_product/22854.txt'}