Practice problem
Let x⃗=[525]\vec{x} = \begin{bmatrix} 5 \\ 2 \\ 5 \end{bmatrix}x=525 and y⃗=[9423]\vec{y} = \begin{bmatrix} 9 \\ 4 \\ 23 \end{bmatrix}y=9423.
What is x⃗⋅y⃗\vec{x} \cdot \vec{y}x⋅y?
57
83
267
168
Type a concept, like “slope” or “photosynthesis”.
