anonymous
  • anonymous
matrix: 2x+3y+ 7z= 13 3x+2y - 5z = -22 5x+7y - 3z = -28
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
@phi can you help me?
precal
  • precal
use elimination
anonymous
  • anonymous
what does that mean?

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

precal
  • precal
multiply -3 to the first equation multiply 2 to the second equation
anonymous
  • anonymous
we have to use matrix
precal
  • precal
idea is to get rid of one variable at a time matrix - even better can you put it in the calculator?
precal
  • precal
|dw:1338861644110:dw|
anonymous
  • anonymous
hahah. no calculators.. this is linear algebra
precal
  • precal
yes, well the idea is still the same except with not using the variables
precal
  • precal
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....... :)
anonymous
  • anonymous
i dont understand the matrix . can you brief me, i feel like my numbers are always wrong and then the whole thing is wrong
anonymous
  • anonymous
if i get a matrix of numbers and when it simplifies: 1 0 3 8 0 0 9 3 0 0 8 9
anonymous
  • anonymous
these are arbitrarty numbers but if i get two rows that have 0 0 does that mean its bad?
precal
  • precal
|dw:1338861963247:dw| this is your goal in the end
precal
  • precal
if it has a solution
anonymous
  • anonymous
right, but if you have any rows that are all zeros that means what?
precal
  • precal
|dw:1338862078583:dw|
anonymous
  • anonymous
k, like:: 2 4 6 -8 3 6 7 10
precal
  • precal
this one has a solution x=-1, y=-2, z=3
precal
  • precal
|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
precal
  • precal
I think that is called row multiplication
precal
  • precal
http://www.wyzant.com/Help/Math/Precalculus/Systems_Of_Equations/Matrix_Method.aspx
anonymous
  • anonymous
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?
precal
  • precal
not sure, I put it in my calculator and it does have a solution
precal
  • precal
sorry reposted your question but label it, must use the matrix (linear algebra) good luck :) sorry

Looking for something else?

Not the answer you are looking for? Search for more explanations.