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## 90092 MTH 1002 A -- Fundamentals of Mathematics -- Fall 2012 Online Course Quiz 11

This web page is http://www.bernstein-plus-sons.com/.dowling/MTH1002F12/MTH1002_Quiz_11.html

This is the one of two weekly quizzes for 4 December 2012 for the MTH 1002 course. Please do this quiz after you have completed the rest of assignment 11. If you do not want delayed grading past the end of the semester, you will also have to do the prior quiz as well at the same time. It should take between one half hour and 2 1/2 hours to complete if you are well prepared, longer if not.

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1. Carefully and in detail explain Guass-Jordan Elimination.

2. Solve the following simultaneous linear equations using only elementary row operations:

Exchange 2 equations (Ri <-> Rj)
Multiply one equation by a non-zero constant (k•Ri -> Ri)
Add a constant multiple of one equation to another equation (k•Rj + Ri -> Ri)

2•x1 - 3•x2 = -2
-4•x1 + 6•x2 = 7

3. Solve the following simultaneous linear equations using only elementary row operations:

Exchange 2 equations (Ri <-> Rj)
Multiply one equation by a non-zero constant (k•Ri -> Ri)
Add a constant multiple of one equation to another equation (k•Rj + Ri -> Ri)

3•x1 - x2 = -5
x1 + 3•x2 = 5