Question

B

Answer 1

good

Answer 2

C

Answer 3

just look at the x-coordinates

2(1) - 3(2) = ?

Answer 4

-3

Answer 5

2 - 6 = ?

Answer 6

OH shoot lol i was doing 5 sorry

Answer 7

A

Answer 8

perfect

Answer 9

D

Answer 10

good

Answer 11

(-2,2)

Answer 12

just look at the x-coordinates first

2 - 3(1) = ?

Answer 13

2-3

Answer 14

-1

Answer 15

and that equals?

Answer 16

-1

Answer 17

awesome so that's the new x-coordinate of the vector

now the y-coordinates

3-(3)1 = ?

Answer 18

0

Answer 19

good so putting the soln's together

(-1,0) = your sol'n

Answer 20

A and C

Answer 21

good

Answer 22

D

Answer 23

awesome

Answer 24

D

Answer 25

good

Answer 26

A

Answer 27

magnitude = sqrt(x^2+y^2) = ?

Answer 28

D

Answer 29

the calc is giving me problems

Answer 30

So im just basically guessing at this point :/

Answer 31

be careful with parentheses

sqrt([-3]^2 + 2^2] = ?

Answer 32

it's fairly simple to do in your head, what's (-3)^2 + 2^2?

Answer 33

got it sqrt 13

Answer 34

perfect, so B

Answer 35

(2,-6)

Answer 36

the dot product is only one number

1. multiply the x-coordinates
2. multiply the y-coordinates
3. then sum the steps from 1 and 2

Answer 37

-4

Answer 38

perfect, that's it

Answer 39

B,C,D

Answer 40

is (-1)(-2) + (3)(-3) equal to 0?

Answer 41

-7

Answer 42

awesome so it's not orthogonal

what about (1)(-1) + 3(3) = ?

Answer 43

8

Answer 44

awesome so C and D are both not orthogonal

what about (-1)(-6) + (2)(3) =?

Answer 45

12

Answer 46

(-1)(-6) + (-2)(3) =?

Answer 47

missed a - sign there whoops

Answer 48

0

Answer 49

awesome so A+B are the orthogonal ones