1. Evaluating Algebraic Equations
Define;
Variable (p. 71)
Algebraic expression (p. 71)

2. What is an equation? What is a variable?
In the Language of Algebra, an equation is the basic number "sentence".
An equation is a mathematical expression that contains an equals sign.
What is a variable?
Symbol the represents one or more numbers.
Variables are usually letters
Ex: In the algebraic expression, 13 – g,
g is the variable

3. Evaluating Algebraic Expressions
When you evaluate an expression;
Replace the variable with the given value
Solve
Ex: Evaluate each expression. Use p=2, n=3, and s=5.
2p b) p + (n • s)

4. Writing Algebraic Expressions
Read the expression carefully
One step at a time, replace the key words in the expression with mathematical operations and keep the numbers & variables.
Examples:
A temperature of t degrees increased by 5 degrees
Five cats fewer than c cats
The product of 5 and n nickels
A dinner bill of d dollars divided among five friends