Question

Help @jim_thompson5910

Answer 1

Lol..it is just a Scalar Multiplication

Answer 2

multiply everything matrix A by 6, call this new matrix C

multiply everything matrix B by 5, call this new matrix D

Once you get matrices C and D, you subtract: C - D

Answer 3

6A = just Multiply Every element of Matrix A by 6

Answer 4

everything in* I meant to say, but you get the idea hopefully

Answer 5

lol ok so..... I multiply everything in A by 6 so for example -3 x 6 and 7 x 6?

Answer 6

correct

Answer 7

ok so I will try it by hand then I will tell you what I come up with and u tell me if its correct :)

Answer 8

alright sounds good

Answer 9

This is what I got for A = -18 42 6
54 48 -30

Answer 10

Is it correct?

Answer 11

@jim_thompson5910

Answer 12

I'm getting the same

Answer 13

now multiply everything in B by 5

Answer 14

ok!!

Answer 15

I got -90 -210 -30
270 240 -150

Answer 16

when you multiplied everything in B by 5 ?

Answer 17

nope

This is what I got -120 90 -270
90 210 180

Answer 18

Now how do I subtract?

Answer 19

that's not correct

Answer 20

???

Answer 21

if you multiply everything matrix B, you should get this

-20 15 -45
15 35 30

Answer 22

so idk how you got that

Answer 23

oh snap lol i multiplied by 5

Answer 24

that's what you were supposed to multiply by..hmm i'm lost lol

Answer 25

im lost too lol

Answer 26

matrix B is what

Answer 27

ah ur right im wrong

Answer 28

now I should subtract both of those right?

Answer 29

correct

Answer 30

ok so how do I do that?

Answer 31

subtract the corresponding componets

Answer 32

components*

Answer 33

So like -90 - (-20)

Answer 34

remember

6A
=
-18 42 6
54 48 -30

so the upper left corner is -18 and NOT -90

Answer 35

OMG im totes comfused but ok lol

Answer 36

remember how you multiplied everything in A by 6 ?

Answer 37

yay I got!!!

Answer 38

Thank you soooo much!! its 2 27 51
43 13 -60 right??

Answer 39

close....

Answer 40

darn it

Answer 41

hint: the top row is perfect

the bottom row...not so perfect

Answer 42

grrr....

Answer 43

its 39

Answer 44

correct

Answer 45

do you see how to get 39?

Answer 46

wait no i dnt know what I did

Answer 47

@@jim_thompson5910

Answer 48

oppps I subtracted 58 instead of 54 :)

Answer 49

oh you see what you did wrong/

Answer 50

?

Answer 51

yup! :)

Answer 52

ok great, glad you got things figured out