Chapter 5: Introduction

Look at the geometry formula for Perimeter of a rectangle P = L + W + L + W. Can this formula be written in a simpler way? If it is true, that we can simplify formulas, it can save us a lot of work and make problems easier. How do you simplify a formula?

A famous formula in statistics is the z-score formula $z=\frac{x-\mu }{\sigma }$. But what if we need to find the x-value for a z-score of -2.4? Can we back solve the formula and figure out what x needs to be?

These are questions we will attempt to answer in chapter 5. We will focus on simplifying expressions and solving equations.

Adapted from Preparing for Algebra and Statistics, Third Edition, by Matt Teachout. License: CC BY 4.0. Copyright and sources.