Solve the system of equations using matrices. Use Gauss-Jordan elimination.

Question

explainitlikeimfive · Answer

attachment

amistre64 · Answer

unless you actually ahve to go thru the process .. just input the options to determine the correct one

amistre64 · Answer

and you seem to be missing a y part in the first one

amistre64 · Answer

do you have to run it by hand?  or can you use a calculator like a ti83?

explainitlikeimfive · Answer

I can use a calculator.

anonymous · Answer

then use it.

explainitlikeimfive · Answer

I don't know how to use the Gauss-Jordan elimination method. Is there a different way of doing it?

amistre64 · Answer

what kind of calculator you got?

amistre64 · Answer

and yeah, there are other ways to approach it

explainitlikeimfive · Answer

ti 84

amistre64 · Answer

go to your matrix functions and setup a 3x4 matrix to rref

amistre64 · Answer

2nd, math is the key presses for a ti83

explainitlikeimfive · Answer

If i did this right, I would choose D.

amistre64 · Answer

rref{{3,-7,-7,7},{6,4,-3,67},{-6,-3,1,-62}}

amistre64 · Answer

amistre64 · Answer

you need to recheck your information ....

explainitlikeimfive · Answer

reworking......

explainitlikeimfive · Answer

Didn't even come close that time.

amistre64 · Answer

your setup and the options do not match

explainitlikeimfive · Answer

So none of the choices are correct?

amistre64 · Answer

nothing matches up ... so i do not see any correct solutions

amistre64 · Answer

i might have the first equation off tho, it that spose to be a -7 in there?  or a -7y?

amistre64 · Answer

explainitlikeimfive · Answer

I think the first equation should be 3x - 7y - 7z = 7 not 3x - 7 - 7z = 7

explainitlikeimfive · Answer

Aha, so it would be D after all.

amistre64 · Answer

the first equation is good as is with the options available

explainitlikeimfive · Answer

Thanks

amistre64 · Answer

youre welcome