Question

Solve the problem below:

Answer 1

ANSWER CHOICES:
210
174
-66
-18
13

Answer 2

Try it.

Answer 3

I have actually.

Answer 4

that looks like the dot product

Answer 5

@jdoe0001 No. Just vector addition.

Answer 6

Looks like 3u--2v

Answer 7

the minus sign seems to have a dot in front of it :/
looks like \(\bf 3u\cdot -2v\)

Answer 8

hmm, maybe is a dash hehee

Answer 9

@lamp12345 Is it a minus or a dot?

Answer 10

Thats what I was confused about. I'm not sure either. thats why i added the actual file instead of typing it in.

Answer 11

Got options?

Answer 12

it doesnt look like a minus though so maybe a dot?

Answer 13

"determine the \(\bf\text{quantity}\) indicated below"

Answer 14

ANSWER CHOICES:
210
174
-66
-18
13

if you want the answer chocies there you go

Answer 15

so, it'd be a scalar result

Answer 16

whats the formula for that then? or how do you do it?

Answer 17

Then it's a dot product.

Answer 18

well, multiplication is just straightforward, the scalar times each component
a <b, c> => <a*b, a*c>

Answer 19

@jdoe0001 Take care of this. I got to go.

Answer 20

the dot product is just
<a, b> \(\cdot\) <c, d> => a*c + b*d

Answer 21

how do you know what a b c and d are?

Answer 22

just the RESPECTIVE component in each vector

Answer 23

tried it again, got the wrong answer AGAIN. Theres a reason im using this site for this problem. thanks anyway

Answer 24

hehe, ok, let's see

Answer 25

My answer? -3

Answer 26

u = <-3, 5> v = <4, 3>
3u => < -3(3), 5(3) > => < -9, 15>
-2v => <4(-2), 3(-2)> => < -8, -6>

\(\bf < -9, 15> \cdot < -8, -6> \implies (-9 \times -8) + (15 \times -6) \\
\implies 72 -90\)

Answer 27

thanks you!

Answer 28

yw

Answer 29

well heheh