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Course: Algebra II / Intermediate Algebra
Topic: Rational Equations and Applications
Subtopic: Formulas - Intermediate

Overview

In order to effectively solve application problems, we first need to be able to work with formulas. Typical formulas you have seen before include geometry formulas like area or perimeter, or banking formulas like simple interest. Today we will concentrate on evaluating formulas given specific input values and rearranging formulas by solving for a specific variable. The formulas in this section may include factorable polynomials or rational expressions.

Objectives

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

• 9.2.1 Given specific input values, evaluate formula (algebraically and electronically)
• 9.2.2 Solve formula for a specific variable

Terminology

Define: formula, input values, isolating a variable

Text Notes

It is likely that your text covered solving elementary formulas for a specific variable in an earlier section. It is worth reviewing that section to get the basics down.

Note that you don't need to know what the formulas in this section are used for or memorize any of them, just how to evaluate them when given specific input values and how to rearrange them by solving for (a.k.a. "isolating") a specific variable.