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liliy Group TitleBest ResponseYou've already chosen the best response.0
@phi can you help me?
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.0
use elimination
 2 years ago

liliy Group TitleBest ResponseYou've already chosen the best response.0
what does that mean?
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.0
multiply 3 to the first equation multiply 2 to the second equation
 2 years ago

liliy Group TitleBest ResponseYou've already chosen the best response.0
we have to use matrix
 2 years ago

precal Group TitleBest 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?
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.0
dw:1338861644110:dw
 2 years ago

liliy Group TitleBest ResponseYou've already chosen the best response.0
hahah. no calculators.. this is linear algebra
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.0
yes, well the idea is still the same except with not using the variables
 2 years ago

precal Group TitleBest 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....... :)
 2 years ago

liliy Group TitleBest 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
 2 years ago

liliy Group TitleBest 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
 2 years ago

liliy Group TitleBest 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?
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.0
dw:1338861963247:dw this is your goal in the end
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.0
if it has a solution
 2 years ago

liliy Group TitleBest ResponseYou've already chosen the best response.0
right, but if you have any rows that are all zeros that means what?
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.0
dw:1338862078583:dw
 2 years ago

liliy Group TitleBest ResponseYou've already chosen the best response.0
k, like:: 2 4 6 8 3 6 7 10
 2 years ago

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

precal Group TitleBest 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
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.0
I think that is called row multiplication
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.0
http://www.wyzant.com/Help/Math/Precalculus/Systems_Of_Equations/Matrix_Method.aspx
 2 years ago

liliy Group TitleBest 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?
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.0
not sure, I put it in my calculator and it does have a solution
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.0
sorry reposted your question but label it, must use the matrix (linear algebra) good luck :) sorry
 2 years ago
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