Lesson Notes By Weeks and Term v4 - JHS 2

Lesson Video

This page supports the lesson note with a companion video and a short classroom-ready summary.

For class groups and homework, share this lesson page so learners also get the summary, objectives, and full lesson context.

Performance objectives

• Identify key phrases that indicate inequalities.
• Translate word problems into linear inequalities.
• Solve linear inequalities.
• Interpret the solutions in the context of the problem.

Lesson summary

In our daily lives in Ghana, we often deal with situations that are not about exact equals. For example, when you go to the market with GHS 10, you can spend an amount that is *less than or equal to* GHS 10. When a trotro is loading, it can take *at most* a certain number of passengers. These situations are described using inequalities. This lesson will teach us how to take these real-life word problems and translate them into the mathematical language of linear inequalities. This skill is the first and most important step in using mathematics to solve problems involving limits, minimums, and maximums.

Lesson notes

a. What is an Inequality?

An equation is a mathematical statement that says two things are *equal*. It always uses the equals sign (=). For example, `x + 2 = 5`.

An inequality is a mathematical statement that says two quantities are *not equal*. It compares two values, showing that one is less than, greater than, or not equal to the other. b. The Four Inequality Symbols

We use four main symbols to show inequality: