In this module you can study how to substitute given values into a formula.
The one-minute video above shows how to evaluate a formula using substitution.
The five-minute video from mathlablady goes into a more indepth explanation.
The most common error made when substituting values into a formula is made when negative signs are dropped.
You must use Order of Operations rules when evaluating formulas.
Study and practice
Use these search terms to find additional resources:
evaluate formula
substitution into formula