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unless you actually ahve to go thru the process .. just input the options to determine the correct one
and you seem to be missing a y part in the first one
do you have to run it by hand? or can you use a calculator like a ti83?
I can use a calculator.
then use it.
I don't know how to use the Gauss-Jordan elimination method. Is there a different way of doing it?
what kind of calculator you got?
and yeah, there are other ways to approach it
go to your matrix functions and setup a 3x4 matrix to rref
2nd, math is the key presses for a ti83
If i did this right, I would choose D.
you need to recheck your information ....
Didn't even come close that time.
your setup and the options do not match
So none of the choices are correct?
nothing matches up ... so i do not see any correct solutions
i might have the first equation off tho, it that spose to be a -7 in there? or a -7y?
now its good http://www.wolframalpha.com/input/?i=rref%7B%7B3%2C0%2C-7%2C14%7D%2C%7B6%2C4%2C-3%2C67%7D%2C%7B-6%2C-3%2C1%2C-62%7D%7D
I think the first equation should be 3x - 7y - 7z = 7 not 3x - 7 - 7z = 7
Aha, so it would be D after all.
the first equation is good as is with the options available