EDGE Math 8

Introduction

In an algebra class, the number of girls is 5 more than the number of boys. If $n$ represents the number of boys, then $n + 5$ represents the number of girls. Hence, the total number of students in the class is equal to $2 n + 5.$

The ratio of the number of boys to the total number of students in the class is given by the following expression:

\frac{n}{2 n + 5} .

This expression is an example of a rational expression.

In this lesson, you will learn about rational expressions. You will learn how to simplify, multiply, and divide such expressions.