Question

How do you solve a matrix?

Answer 1

you mean, how do you solve a matrix equation?

Answer 2

Yes, right now were learning about matrices and I have no idea how to solve them.

Answer 3

\(Ax=b\) you augment you matrix \(A\) with \(b\) then row reduce

or

left multiply \(b\) with \(A^{-1}\)

Answer 4

If I showed you some of the matrices I'm working on could you help me solve them.

Answer 5

can I see a problem to see if it's the same thing were doing ?

Answer 6

Sure give me a minute.

Answer 7

Here are some of the matrix I'm working on.

Answer 8

hmm, i forgot about augmenting ... abstract algebra ruined it for me :)

Answer 9

@amistre64 Can you help me solve those matrix I just posted?

Answer 10

for the second one, you have any ideas?

Answer 11

I'm not sure on any of them.

Answer 12

Do you know how to the inverse of a 2x2 matrix?

Answer 13

i am, i just need to assess your thoughts. this type of stuff requires you to do the thinking, i can correct come bad ideas if they come up.

#1 can be determined by trial and error
#2 is rather basic relating the structure of systems to matrixes

Answer 14

#3 is just application

Answer 15

#3,4,5 are just applicaitons

Answer 16

No I do not. @zzr0ck3r

Answer 17

@amistre64 I don't know how to solve any of them.

Answer 18

then its beyond the scope of my abilities since you would need to have some basic idea of the fundamentals things that are going on.

Answer 19

Really, Is there any way you can help me solve these. I need to have a basic idea how to get the answer.

Answer 20

if you have no idea and you just found these questions lying in a ditch and rushed them here to see if they could be saved .. well, they exist in the context of previous work.

Answer 21

saying you have no idea what to do amounts to you simply saying you have no prior knowledge

Answer 22

Actually these are some practice questions for my math class.

Answer 23

sorry, but theres not enough time at the moment to go over all the fundamentals. good luck zz

Answer 24

@zzr0ck3r is there any way you could help me solve these problems.

Answer 25

for a system

\(a_0x+b_0y+c_0y=d_0\\a_1x+b_1y+c_1z=d_1\\a_2x+b_2y+c_2z=d_2\)
we get the matrix equation

\(\bigl( \begin{smallmatrix}
a_0 & b_0 & c_0\\
a_1 & b_1 & c_1 \\
a_2 & b_2 & c_2
\end{smallmatrix} \bigr)\)\(\bigl( \begin{smallmatrix}
x \\
y\\
z\\
\end{smallmatrix} \bigr)\)\(=\bigl( \begin{smallmatrix}
d_0\\
d_1 \\
d_2
\end{smallmatrix} \bigr)\)

Answer 26

so what is the answer to the second one?

Answer 27

I'm thinking its either B or C.

Answer 28

dont guess....

Answer 29

I really don't know. I'm thinking its either B or C I'm not 100% sure.

Answer 30

you are right, look at the first row of the matrix, and look at the first row of the equations it gave you, what is the value on y?

Answer 31

yes what is the number next to y in the first equation?

Answer 32

Problem 2

the very first time you see a y what is the number next to it?

Answer 33

I really think that you are way behind and I am not going to be able to help. I will not just give the answers but at this rate it will take us 10 hours to do all these problems. Each problem you posted has a different method to solve, and each one takes quite a bit of knowledge about the subject. Go read the book, this question 2 was covered in the first or second day of class....

Answer 34

I am behind with my math class. I'm trying to get caught up.

Answer 35

read the book

Answer 36

@zzr0ck3r Can you at least tell me for #2 weather it's B or C.

Answer 37

the first equation in your system is 2y + 7z = -3

this is the same thing as 0x+2y+7z = -3 (your equations are in x,y,z this one just has a 0 as the coefficient on x)

so 0x+2y+7z=-3 we are looking for an matrix where one of the rows are (0 2 7) and that row corresponds to being equal to -3

Answer 38

what is the answer?

Answer 39

B

Answer 40

you are just guessing...

Answer 41

How was that a guess.

Answer 42

if you cant answer what matrix has a 2 in the first collumn you shuold drop your class

Answer 43

I'm already In semester B. I'm required to take this class to graduate high school.

Answer 44

there is one matrix with the row 0 2 7

\(\huge C\)

Answer 45

Oh OK, Thanks @zzr0ck3r

Answer 46

Hey @melissaaaa are the problems I posted above anything like what you are learning about?

Answer 47

http://www.ehow.com/how_4557439_solve-matrix.html

Answer 48

@destineeswagga thanks for the link. By chance, Do you know the answers for the problems I posted (1, 3-5)?

Answer 49

Im not good at math sorry ;/

Answer 50

Neither am I anymore. Thanks anyway @destineeswagga

Answer 51

@Hero Can you help me?

Answer 52

sorry I was taking an exam do you still need help ?

Answer 53

@melissaaaa If you could help me still that would be great. I got the answers for the problems I posted above, but I still need some more help.