6.3 Outline

A. Evaluate - this is the third of four main processes in algebra
      1. definition
      2. with exponents
      3. with mixed operations
B. An application from genetics
C. Spreadsheets
      1. definition
      2. cell
      3. replicate

6.3 Essential Ideas

Mathematical substitution is used with the evaluation of expressions. For example if
x = y and y = 3, then x = 3.

We also use spreadsheet evaluation in this section.
An interesting application from the biological sciences is also consider in this section.