Question

If v = (2,4) and V2 = (-1,5), then v -Uy is equal to which of the following?O 18O (-2, 20)0 22O (8.-5)

Answer 1

We are given the following vectors:

$\begin{gathered} v_1=(2,4) \\ v_2=(-1,5) \end{gathered}$

We are asked to determine the dot product of the vectors. The dot product is defined as the sum of the product of each corresponding coordinate of the vectors, that is:

$v_1\cdot v_2=(2)(-1)+(4)(5)$

Solving the product:

$v_1\cdot v_2=-2+20$

Solving the addition:

$v_1\cdot v_2=18$