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practice test 2 m1313.docx

Question 6   Your answer is CORRECT . Which of the following matrices are in row - reduced form ? ( Note : The dotted vertical line in each matrix should be a single vertical line . )
a I. II . III .
a ) I and II only
Answer:  a )   I and II only
Question 7   Your answer is CORRECT . Use the Gauss - Jordan elimination process on the following system of linear equations to find the value of x .