Data Mining
Which of the following steps are done before data modeling? SELECT ONE
Data cleaning
Data reduction
Data transformation
All of the above
Utilize the Gauss-Jordan elimination method to solve the system of linear equations. (If there is no solution, enter NO SOLUTION. If there are infinitely many solutions, express your answer in terms of the parameters t and/or s.)
x+2y+z=−4
−2x−3y−z=2
4x+8y+4z=−16