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precalBest ResponseYou've already chosen the best response.0
multiply 3 to the first equation multiply 2 to the second equation
 one year ago

precalBest ResponseYou've already chosen the best response.0
idea is to get rid of one variable at a time matrix  even better can you put it in the calculator?
 one year ago

liliyBest ResponseYou've already chosen the best response.0
hahah. no calculators.. this is linear algebra
 one year ago

precalBest ResponseYou've already chosen the best response.0
yes, well the idea is still the same except with not using the variables
 one year ago

precalBest ResponseYou've already chosen the best response.0
sorry it has been a long time since I have done linear algebra. I just remember it was my favorite course during my undergrad days....... :)
 one year ago

liliyBest ResponseYou've already chosen the best response.0
i dont understand the matrix . can you brief me, i feel like my numbers are always wrong and then the whole thing is wrong
 one year ago

liliyBest ResponseYou've already chosen the best response.0
if i get a matrix of numbers and when it simplifies: 1 0 3 8 0 0 9 3 0 0 8 9
 one year ago

liliyBest ResponseYou've already chosen the best response.0
these are arbitrarty numbers but if i get two rows that have 0 0 does that mean its bad?
 one year ago

precalBest ResponseYou've already chosen the best response.0
dw:1338861963247:dw this is your goal in the end
 one year ago

liliyBest ResponseYou've already chosen the best response.0
right, but if you have any rows that are all zeros that means what?
 one year ago

liliyBest ResponseYou've already chosen the best response.0
k, like:: 2 4 6 8 3 6 7 10
 one year ago

precalBest ResponseYou've already chosen the best response.0
this one has a solution x=1, y=2, z=3
 one year ago

precalBest ResponseYou've already chosen the best response.0
dw:1338862146454:dw you goal is to create that solution form (sorry I can't even remember its official name, may I be forgiven by the math gods) I would multipy the first row by (1/2) that would force that first term to turn into a 1 but don't forget to change all the other numbers in that row
 one year ago

precalBest ResponseYou've already chosen the best response.0
I think that is called row multiplication
 one year ago

precalBest ResponseYou've already chosen the best response.0
http://www.wyzant.com/Help/Math/Precalculus/Systems_Of_Equations/Matrix_Method.aspx
 one year ago

liliyBest ResponseYou've already chosen the best response.0
got it, but for the little example i just posted: 2 4 6 8 3 6 7 10, this matrix, i get the bottom row is 0 0 .. and none of the multiple choices look like that, what am i doing wrong?
 one year ago

precalBest ResponseYou've already chosen the best response.0
not sure, I put it in my calculator and it does have a solution
 one year ago

precalBest ResponseYou've already chosen the best response.0
sorry reposted your question but label it, must use the matrix (linear algebra) good luck :) sorry
 one year ago
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