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OpenStudy (anonymous):
Solve the system of equations using matrices. Use Gauss-Jordan elimination 3x-7y-7z = 7 6x+4y-3z=67 -6x-3y+z=-62
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OpenStudy (anonymous):
To use elimination to solve, add the last 2 equations together and continue adding equations so that one variable cancels each time
OpenStudy (anonymous):
I know how to do it that why I have to use matrices
OpenStudy (anonymous):
Ok. So make a 3 x 4 matrix out of it and plug it in your graphing calc to get the answer...
OpenStudy (anonymous):
I tried that but I have to show my work
OpenStudy (anonymous):
sorry, I don't do those by hand :(
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