Writing and Evaluating Expressions with Formulas and Variables

The video tutorial explains how to use formulas to write and evaluate algebraic expressions by substituting a given number for a variable. It covers finding the perimeter of a square with a side of 2x, calculating speed as distance divided by time, and determining the area of a square with side 2x. The tutorial emphasizes the importance of correctly substituting values into expressions and formulas.

What is the formula for speed in relation to distance and time?

How do you calculate the area of a square with a side of 2 times x?