p. 316 # 2(ab) (and the question at the end of the problem), 4(ab), 16

p. 326 # 2, 8, 14 (last sentence only; use the top of page 319), 24

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More problems for practice (do not hand these in)

p. 316 # 1, 17, 19 (not the pivots)

p. 326 # 23, 31