Elementary Algebra Review Part 31
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Lesson Summary:
In this lesson, students learn how to solve and graph inequalities on a number line. The instructor provides three different methods for solving the inequalities, emphasizing the importance of switching the inequality symbol when dividing by a negative number. After finding the solutions, the instructor demonstrates how to graph them on a number line. The lesson concludes with a final problem, where the instructor shows how to take the opposite of everything to solve the inequality.
Lesson Description:
Solving and graphing inequalities on a number line.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Questions answered by this video:
- How do you solve and graph inequalities on a number line?
- How can you check to make sure that you graphed an inequality correctly?
- What happens when you multiply or divide an inequality by a negative number?
- How do you solve an inequality if the coefficient of x is negative?
- When do you flip the sign on an inequality?
- How do you solve and graph -3x >= -12 on a number line?
- What are some other ways to solve an inequality?
- How do you solve 7x + 4 < 9x and graph the solution set on a number line?
- How can you rewrite an inequality so the variable is on the left side?
- How can you rewrite 2 < x so x is on the left?
- How do you solve and graph -x <= 0 on a number line?
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Staff Review
This video does some more examples of solving inequalities and graphing the solution set on a number line. This lesson wraps up chapters 1 and 2 of the elementary algebra review series. All steps are explained and shown very clearly in all example problems.
