Evaluating mathematical expressions

The video tutorial explains how to evaluate mathematical expressions by substituting given values for variables. It covers two examples: one with basic arithmetic and another involving a rational expression. The tutorial emphasizes understanding the term 'evaluate', using parentheses for clarity, and applying the order of operations. It concludes with a reminder that evaluation involves substituting values without solving equations.

What does it mean to evaluate a rational expression?

Explain the importance of order of operations when evaluating expressions.

Describe the process of evaluating the expression involving division and multiplication.