Thirty-five (35) exercises from Cohen whose solutions are due:

1.6   Equations of Lines, page 52:

1, 3, 4, 11, 12, 13, 15, 17, 19, 26, 28, 31, 33, 35, 44, 46, 47, 48, 50, 56

1.7   Symmetry and Graphs. Circles, page 67:

3, 7, 8, 9, 11, 13, 14, 15, 19, 39, 41, 44, 48, 53, 57