Section 7.5
Problems 6, 10, 18, 20, 35 - 37.
Note that you do 6 & 10 using the cofactor method and 18 & 20 using row-reduction.
Section 7.6
Problems 2, 10
Lab Book
Page 170, problems 1-8
Section 7.7
Problems 5, 16, 18, 23, 26, 27