Use the Vectors $\mathbf { u } = \langle 4,5 \rangle$

Multiple Choice

Use the vectors $\mathbf { u } = \langle 4,5 \rangle$ , $\mathbf { v } = \langle - 6,5 \rangle$ , and $\mathbf { w } = \langle 6 , - 4 \rangle$ to find the indicated quantity.State whether the result is a vector or a scalar.
$\langle \mathbf { u } \cdot \mathbf { v } \rangle - \langle \mathbf { u } \cdot \mathbf { w } \rangle$

A) -1; scalar
B) $\langle 1 , - 7 \rangle$ ; vector
C) $\langle - 3 , - 3 \rangle$ ; vector
D) -3; scalar
E) -5; scalar