Question

r = <9, -7, -1>, v = <2, 2, -2>, w = <-5, -2, 6>

v ⋅ w

Answer 1

@Mertsj

Answer 2

\[
\mathbf v = <\color{red}{2}, \color{blue}2, \color{green}{-2}>, \mathbf w = <\color{red}{-5}, \color{blue}{-2}, \color{green}6>
\]\[
\mathbf v\cdot \mathbf w = \color{red}{2\times -5}+ \color{blue}{2\times -2}+\color{green}{-2\times 6}
\]

Answer 3

-10-4-12=-28

Answer 4

*-26

Answer 5

You can do it on your own.