## Homework Hints 18-2

### 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 … See the whole entry

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 … See the whole entry

This site gives a nice review of solving simple systems of equations.

http://www.purplemath.com/modules/systlin1.htm

This site gives a review of solving simple systems of equations by adding with links to solving simple systems using other methods. This is a great site … See the whole entry

A nice overview of the conic sections can be found at this site:

http://www.mathacademy.com/pr/prime/articles/concis/index.asp

This is a great interactive site for graphing conic sections.

In order to use this graphing tool, you need to write the equation in the form… See the whole entry

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 … See the whole entry

Select something that you think might be normally distributed (for example, the ring size of students at your college). Next, select 100 people and make the appropriate measurements (in this example, ring size). Calculate the mean and standard … See the whole entry

- Trees
- definition
- spanning tree

- Minimum spanning trees
- weight
- weighted graph
- definition
- Kruskal’s algorithm
- number-of-vertices-and-edges-in-a-tree theorem

A **tree** is a graph which is connected and has no circuits. A tree that is created from another … See the whole entry

- Euler circuits
- Konigsberg bridge problem
- definition of a graph (or a network)
- traversable network
- degree of a vertex
- Euler circuit
- odd/even vertex
- connected network
- Euler’s circuit theorem

- Applications of Euler circuits
- supermarket problem
- police patrol problem
- floor-plan problem