Practice problem
Let x⃗=[355]\vec{x} = \begin{bmatrix} 3 \\ 5 \\ 5 \end{bmatrix}x=355 and y⃗=[141]\vec{y} = \begin{bmatrix} 1 \\ 4 \\ 1 \end{bmatrix}y=141.
What is x⃗⋅y⃗\vec{x} \cdot \vec{y}x⋅y?
28
31
43
64
Type a concept, like “slope” or “photosynthesis”.
