Question

Evaluate the expression. r = <5, 9, -4>, v = <3, 3, -8>, w = <9, -6, -1>
v - w

Answer 1

if p=<a,b,c>, and q=<d,e,f>
p-q=<a-d, b-e, c-f>

Answer 2

I did that, and I don't if it's because I'm exhausted I got <27,-18,-8>

Answer 3

@cariestrada you multiplied instead of subtracted

Answer 4

ahhh jeez so it's <-6,9,-9> ?

Answer 5

close

Answer 6

the issue is the last term

-8 - (-1) = -9 is false

Answer 7

-7!

Answer 8

yes

Answer 9

But those are none of my answer choices :(

Answer 10

what are your answer choices?

Answer 11

<-15,-27,-21>
0
17
<-27, -18,8>

Answer 12

could it be that they want the dot product instead of v - w ?

Answer 13

That's what I was thinking, but the question is literally like I posted above, and it's a subtraction sign

Answer 14

because when I did the dot product of v and w, I got

v dot w = 3*9+3*(-6)+(-8)*(-1) = 27 - 18 + 8 = 17

which is a listed answer choice

Answer 15

could be a typo on their end

Answer 16

True, I'm gonna go with that. Thank you!

Answer 17

no problem