Unformatted text preview: The average was about 40/60. The unoﬃcial scale starts with A’s = 48 to 60 etc (then, each letter grade is 10 percent (6 points) lower). I also computed the total of your 3 quiz scores, and estimated your semester grade on the upper right corner of your quiz. The average total was 123/180. This does not yet include your HW or MHW grades. I felt the grades were lowest on problem 2. Please practice problems like 2a) [which were also on HW2 and Quiz 2] until you’ve mastered them; these should be easy by now! 1) x 2 = det A 2 / det A =-1 / 5 2) X = ( A-2 I )-1 B ; A = 2 I and any B 6 = O ; It is a singular matrix 3) FTFTT 4) See the text. 1...
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- Spring '09