# Objectives Solve compound inequalities with one variable

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Objectives Solve compound inequalities with one variable.
Graph solution sets of compound inequalities with one variable. You can graph the solutions of a compound inequality involving AND by using the idea of an overlapping region. The overlapping region is called the intersection and shows the numbers that are solutions of both inequalities. Example 2A: Solving Compound Inequalities Involving AND
Solve the compound inequality and graph the solutions. 5 < x + 1 < 2 Since 1 is added to x, subtract 1 from each part of the inequality. 5 < x + 1 < 2 1 1 6 Example 3A: Solving Compound Inequalities Involving OR
Solve the inequality and graph the solutions. 8 + t 7 OR 8 + t < 2 8 + t 7 OR 8 + t < 2 Solve each simple inequality. 8 8 t 1 ORt < 6 Graph t 1. Graph t < 6. Graph the union by combining the regions. 10 8 6 4 2 2 4 6 8 10 Example 3B: Solving Compound Inequalities Involving OR
Solve the inequality and graph the solutions. 4x 20 OR 3x > 21 Check It Out! Example 3a Solve the compound inequality and graph the solutions. 2 +r < 12 OR r + 5 > 19 Check It Out! Example 3b Solve the compound inequality and graph the solutions. Every solution of a compound inequality involving AND must be a solution of both parts of the compound inequality. If no numbers are solutions of both simple inequalities, then the compound inequality has no solutions. The solutions of a compound inequality involving OR are not always two separate sets of numbers. There may be numbers that are solutions of both parts of the compound inequality. Example 4A: Writing a Compound Inequality from a Graph
Write the compound inequality shown by the graph. Example 4B: Writing a Compound Inequality from a Graph
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