Elementary Algebra
Introduction to Algebra Linear Equations and Inequalities Functions and Graphs I Lines and thier Graphs Linear Systems Exponents & Polynomials
Intermediate Algebra
Factoring Rational Expressions Rational Equations and Applications Radical Expressions Nonlinear Equations and Applications Functions and Graphs II Exponential and Logarithmic Functions
Precalculus I / College Algebra
Equations and Inequalitites Functions and Graphs Polynomial and Rational Functions Exponential and Logarithmic Functions Systems and Matrices Geometry Basics Conic Sections Sequences and Series
Precalculus II / Trigonometry
The Six Trigonometric Functions Right Triangle Trigonometry Circular Functions Graphs of Trigonometric Functions Trigonometric Identities Trigonometric Equations Oblique Triangles and the Laws Vectors Complex, Parametric, and Polar Forms
Calculus I
Limits and Continuity Derivatives Analysis of Curves Antiderivatives
Calculus II
Transcendental Functions
Geometry Physics Integration Techniques Calculus of Infinity Parametric, Polar, and Conic Curves
Calculus III

Course: Elementary Algebra
Topic: Linear Equations and Inequalities
Subtopic: Formulas - Elementary

Overview

Examples of "formulas" that you have likely seen are a2+b2=c2, D=RT, A=½bh, etc. Today's material concentrates on evaluating such formulas for given values of the variables. Watch your units when you are evaluating! We also learn to rearrange the formulas by solving for a specific variable like rewriting A=½bh as h=2A/b. This will be useful when dealing with real-world applications.

Objectives

By the end of this topic you should know and be prepared to be tested on:

• 2.2.1 Evaluate formulas given specific input values
• 2.2.2 Solve formulas for a specific variable
• 2.2.3 Be able to do 2.2.2 above given formulas (that you may never have seen before) from a variety of subject matters including finance, business, medical, geometry, and engineering.

Terminology

Terms you should be able to define: formula, percent, percent increase, percent decrease