33:13

Ch9 3 Graphing linear equations

31:35

Ch9.1 points lines angles

27:08

Ch8 4 Percent increase decrease problems

21:51

Ch7 5 Conversion between systems temperature

22:42

Ch8 5 Solving problems involving interest

15:00

Ch8 2 Solving basic percent sentences

12:27

Ch8 1 Introduction to percent

14:33

Ch8 3 Solving percent problems