On 9/6/99, hardinpe asks about Q17 of MA322-005,Section 2.1 and 2.2: the answers were different when i printed them out.  Response:  Very observant.   You caught me changing  the answer.  It is now correct.

On 9/1/99, downeyad asks about Q13 of MA322-005,Section 2.1 and 2.2: Please go over this in class. Response:  carry out the elimination to determine the conditions needed on a and b.

On 9/1/99, downeyad asks about Q8 of MA322-005,Section 2.1 and 2.2: I don't understand why this is the answer Response:  Check where [1,0] and [0,1] go under the rotation.

On 9/10/99, doddsme asks about Q16 of MA322-005,Section 2.1 and 2.2 (Complete by Sept 9): I'm not going to resubmit for one question, but I did figure out what I did wrong. (0 + 0 = 6?) I forgot about the other side of the equations. I think this was a really good question. Response:   You are right.  When reducing the system to upper triangular form, if you get an equation of the form  0 = b where b is not 0, then you know the system is inconsistent (has no solutions)

On 9/9/99, carrsh asks about Q15 of MA322-005,Section 2.1 and 2.2 (Complete by Sept 9): Can we go over upper triangular form in class please? Response:   Yes.  This is particularly important.   Also read pages 14 and 38 (i think, check the index) for discussion of upper triangular form.

On 9/1/99, downeyad asks about Q13 of MA322-005,Section 2.1 and 2.2: Please go over this in class. Response:   We will  (and did).

On 9/1/99, downeyad asks about Q8 of MA322-005,Section 2.1 and 2.2: I don't understand why this is the answer Response:   Look at the lefthand picture at the top of page 15.  That shows where the first column of the correct answer comes from.   Now use the same idea to figure out that the second column.   You should get  the first alternative as the correct choice.