Find a· b.
-$$\mathbf { a } = 4 \mathbf { i } + 6 \mathbf { j } , \quad \mathbf { b } = - 5 \mathbf { i } - 0.5 \mathbf { j }$$
A) $- 23$
B) $\langle - 1,5.5 \rangle$
C) $\langle - 20 , - 3 \rangle$
D) 17

Name: Find a· b. -\[\mathbf { a } = 4 \mathbf { i } + 6 \mathbf { j } , \quad \mathbf { b } = - 5 \mathbf { i } - 0.5 \mathbf { j }\] A) $- 23$ B) $\langle - 1,5.5 \rangle$ C) $\langle - 20 , - 3 \rangle$ D) 17
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Question

Quizplus · Accepted Answer

The dot product $a \cdot b$ is calculated as $4(-5) + 6(-0.5) = -20 - 3 = -23$.

Find A· B - a=4i+6j,b=−5i−0.5j\mathbf { a } = 4 \mathbf { i } + 6 \mathbf { j } , \quad \mathbf { b } = - 5 \mathbf { i } - 0.5 \mathbf { j }a=4i+6j,b=−5i−0.5j

Find A· B
- $\mathbf { a } = 4 \mathbf { i } + 6 \mathbf { j } , \quad \mathbf { b } = - 5 \mathbf { i } - 0.5 \mathbf { j }$