p. 240 # 2, 12, 14, 18 (A is 3 x 3), 22, 30

p. 250 # 2, 4, 6(a) (justify), 22, 32

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More problems for practice (do not hand these in)

p. 240 # 1, 3, 5, 7, 21, 23, 29

p. 250 # 1, 5, 7, 11