Question

Find the vector z, given u=‹-1, 3, 2›, v=‹1, -2, -2›, and w=‹5, 0, -5›. Use a graphing utility to verify your work.
z = -7u+v - 1/5 w

Answer 1

learn your vectors lol

Answer 2

Meanie

Answer 3

:D

Answer 4

:,C

Answer 5

>:D

Answer 6

:<

Answer 7

Please help? :O

Answer 8

( http://www.youtube.com/watch?v=fVbqJJZP_rQ) this should give you everything you need to know about them sweatheart.

Answer 9

Thank you :)

Answer 10

<3

Answer 11

How do you work with three? I know I have to distribute the values in fornt of the vectors, but how do I find z?

Answer 12

*front

Answer 13

scale each vector out; then add them up by like components

Answer 14

Okay :D Thank you!

Answer 15

So, it will be like this:
<-1+7+1, 3-21 + 0, 2-14 -1> ?

Answer 16

z = -7u+v - 1/5 w

-7‹-1, 3, 2›
+‹1, -2, -2›
-‹5, 0, -5›/5
--------------


‹ 7, -21, -14›
‹ 1, -2, -2›
‹-1, 0, 1›
--------------
z =

Answer 17

i tend to like to line things vertically so i can see what im doing

Answer 18

Go amistre64!

Answer 19

z = < 7, -18, -11> ?

Answer 20

watch your signs .....

Answer 21

youve got a few signs backwards, other than that, it the right concept

Answer 22

? Which ones?

Answer 23

‹ 7, -21, -14›
‹ 1, -2, -2›
‹-1, 0, 1›
--------------
z = <7,-23,-15>

Answer 24

I thought the 7 in front of the vect was -7 ?

Answer 25

Oh, am I supposed to mult. by a - 1/5 too?

Answer 26

of course

Answer 27

;D

Answer 28

Okay, I see

Answer 29

<-1+7+1, 3-21 + 0, 2-14 -1>
^ ^
bad bad

Answer 30

Those were my errors? O:

Answer 31

some of them, its hard for me to read things horizontal; its mmuch nicer when we stack them

Answer 32

remember when you learned addition how they stacked terms up?

Answer 33

5
+ 3
---
8

Answer 34

of course silly xD

Answer 35

good

Answer 36

okay:
- 7< -1, 3, 2 >
+ -1/5< 1, -2, -2
----------------------

Answer 37

try again; its a +1 in front of that one, not a -1/5

Answer 38

- 7< -1, 3, 2 >
+1< 1, -2, -2>
--------------

Answer 39

I thought 1/5 was negative, and this was an addition equation?

Answer 40

-1/5w is in the eq

Answer 41

Ohhh I see. So what do you do with the w?

Answer 42

addition is a misnomer; we are combining things ...

Answer 43

well, we can combine it in now, or do these 2 then combine it afterwards

Answer 44

okay

Answer 45

- 7< -1, 3, 2 >
+1< 1, -2, -2>
--------------


< 7,-21,-14 >
< 1, -2, -2 >
--------------
<8,-23,-16> ; right?

Answer 46

Yes. Yay :D

Answer 47

and now you add the < 1, 0, -1>

Answer 48

< 8,-23,-16>
-1/5 < 5, 0 , -5>
-------------------


< 8,-23,-16>
-1 < 1, 0 , -1>
-------------------


< 8,-23,-16>
<-1, 0 , 1>
-------------------
<7,-23,-15>; right?

Answer 49

Yes :D

Answer 50

And that's the final answer
z = <7,-23,-15>

Answer 51

id say so, since theres nothing else to combine with it :)

Answer 52

<3 Thank you very much. I really appreciate your help!

Answer 53

youre welcome, and good luck