HELP!
lol

- anonymous

HELP!
lol

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- anonymous

wait up

- anonymous

##### 1 Attachment

- anonymous

OKIE HELP :C

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## More answers

- Haseeb96

you can solve it by using carmer's rule

- anonymous

?

- anikhalder

We have the 3 equations. Subtract eq 3 from eq 2 and solve for y.
After you get y plug it into eq 1 and you will get an equation in x and z.
Now solve that equation and eq 3 and you will find x and z. (Simultaneous equations)

- anonymous

i need to solve using matrixes x.x

- anonymous

i mean substitution and elimination are easy methods but matrixes are confusing :(

- anikhalder

Do you know about Gauss' elimination?

- anonymous

eh no

- anonymous

if its related to matrixes maybe

- anikhalder

Gaussian elimination is to do with matrices

- anikhalder

From Google:
You can perform three operations on matrices in order to eliminate variables in a system of linear equations:
You can multiply any row by a constant (other than zero). multiplies row three by –2 to give you a new row three.
You can switch any two rows. swaps rows one and two.
You can add two rows together.

- anonymous

x.x thats different I'm solving for x and y and z using matrixes not finding the discriminant

- anikhalder

http://www.dummies.com/how-to/content/how-to-use-gaussian-elimination-to-solve-systems-o.html
Have a quick look into this and see if this is what you want or not.

- anonymous

ok

- anonymous

no i won't help :C

- anonymous

:(

- anikhalder

I'm sorry my friend, Gaussian elimination is the way that's coming to my mind in order to solve the system of equations using matrices. It's a very powerful technique and I would highly recommend you to go through this video on Khan Academy:
https://www.khanacademy.org/math/precalculus/precalc-matrices/matrix-equations/v/matrix-equations-systems

- anonymous

okie

- anonymous

:C i don't get it I'm doomed

- anonymous

wait in my book it tells me to use a graphing calculator

- anonymous

how do i even type this into a graphing calculator

- anikhalder

I'll be honest with you. It's a shame, I know, but I never used a graphing calculator. I always tried to graph by hand and used a simple fx calculator in order to go about.
I found this article, I do not know whether it will be of any help. But you might want to go through it:
http://mathbits.com/MathBits/TISection/Algebra1/systems.htm

- anonymous

x.x okie thnx

- anikhalder

Sorry, couldn't be of any help.

- anonymous

its okie have a meal fur effort xD

- anikhalder

I really appreciate it. Thank you. But it's really important that you know how to tackle these questions than me getting a medal. And I'd suggest once again, when you get time, go through Gaussian elimination. :)))

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