Question

Evaluate the expression

Answer 1

whats the expression?

Answer 2

r= <9,-7, -1> v=<2,2,-2> w=<-5,-2,6>

Answer 3

what do you want to do with these vectors?

Answer 4

Find v-w

Answer 5

\[\vec v - \vec w = \langle 2-(-5)~,~ 2-(-2)~,~ -2-6\rangle\]

Answer 6

Simplify.

Answer 7

<7,4,-8>?

Answer 8

Yep.

Answer 9

That's what i thought too but its not an answer choice
<-18,14,-2>
-26
1
<-10,-4,-12>

Answer 10

Maybe I have to multiply v x w

Answer 11

well -26 is the dot product!

typo?

Answer 12

No it says subtract. Most likely a mistake on my teachers part

Answer 13

Can you help me with another problem please?

Answer 14

Can I get help on vectors too?

Answer 15

Express the complex number in trig form
-2+2 sqrt(3) i

Answer 16

It might also be
-2+2 sqrt (3i)....sorry I can't tell

Answer 17

Choices I have are
2sqrt (3)((cos (2pi/3 )+i sin(2pi/3))
4 ((cos (5pi/6) + i sin(5pi/6))
2sqrt (3)((cos (5pi/6)+i sin(5pi/6))
4 ((cos (2pi/3) + i sin(2pi/3))

Answer 18

does that look familiar