# Homework Hints 16-5

### Note: Homework Hints are given only for the Level 1 and Level 2 problems.

However, as you go through the book be sure you look at all the examples in the text. If you need hints for the Level 3 problems, check some sources for help on the internet (see the LINKS for that particular section. As a last resort, you can call the author at (707) 829-0606.

On the other hand, the problems designated “Problem Solving” generally require techniques that do not have textbook examples.

There are many sources for homework help on the internet.

Algebra.help
Here is a site where technology meets mathematics. You can search a particular topic or choose lessons, calculators, worksheets for extra practice or other resources.
http://www.algebrahelp.com/

Dr. Math is a registered trademark. This is an excellent site at which you can search to see if your question has been previously asked, or you can send your question directly to Dr. Math to receive an answer.
http://mathforum.org/dr.math/

Quick Math
This site provides online graphing calculators. This is especially useful if you do not have your own calculator.
http://www.quickmath.com/

The Math Forum @ Drexel
This site provides an internet mathematics library that can help if you need extra help. For additional homework help at this site, click one of the links in the right-hand column.
http://mathforum.org/

Problems 1-4
These problems are testing your understanding of the key concepts in this section. Read the text and then paraphrase or describe each word or process in your own words. If you get stuck, look in the book, but don’t copy your answers directly out of the book.
Problems 5-18
Graph each boundary line (solid if included, dashed if not).
Next, use a test point to determine the half-plane for each boundary. Use a highlighter pen to shade the intersection of the half-planes. See Examples 1 and 2.
Problem 19
This problem is making sure you know when a point is feasible.
Problem 20
This problem is making sure you know when you have a corner point.
Problems 21-34
Graph each boundary line (solid if included, dashed if not).
Next, use a test point to determine the half-plane for each boundary. Use a highlighter pen to shade the intersection of the half-planes. See Examples 1 and 2.
Problems 35-46
Set up these problems by building a table as shown in Example 3. Read the directions carefully; you are asked for the corner points only.
Problems 47-51
The procedure to follow is shown using four steps summarized in a box at the beginning of this section. These steps are illustrated in Example 3.