Problems 1-16
See Example 2

Problems 17-22
See Example 4.

Problems 23-30
See Example 5.

Problems 31-34
See Example 4. You might consider solving for one of the variables when graphing the boundary line.

Problems 35-40
See Example 1.

Problems 41-47
See Example 3.

Problem 48
There is no right or wrong answer for this problem but you should spend at least five minutes in answering this question.

Note: Homework Hints are given only for the levels 1 and 2 problems. You can also check some sources for homework help on the Internet (see Links, below), or you can call the author at (707) 829-0606 or send an e-mail to: smithkjs@mathnature.com