What do they mean by perpendicular?

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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What do they mean by perpendicular?

15. The missing entry to make the vectors 

\[
\begin{pmatrix}
1 \\
2 \\
0 \\
\end{pmatrix},
\begin{pmatrix}
-4 \\
2 \\
\boxed{\phantom{0}} \\
\end{pmatrix}
\]

and 

\[
\begin{pmatrix}
6 \\
-3 \\
3 \\
\end{pmatrix}
\]

perpendicular is:

- a. **10**
- b. \(-10\)
- c. \(0\)
Transcribed Image Text:15. The missing entry to make the vectors \[ \begin{pmatrix} 1 \\ 2 \\ 0 \\ \end{pmatrix}, \begin{pmatrix} -4 \\ 2 \\ \boxed{\phantom{0}} \\ \end{pmatrix} \] and \[ \begin{pmatrix} 6 \\ -3 \\ 3 \\ \end{pmatrix} \] perpendicular is: - a. **10** - b. \(-10\) - c. \(0\)
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