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Notes 2.5.notebook 1 October 17, 2017 Warm-up: Solve each inequality, if possible. 1. 2x + 4 < 2(x - 6) 2. 6x + 3 > 6x - 5 1.) solve compound inequalities in one variable . 2.) graph solutions of compound inequalities in one variable. 3.) write a compound inequalitiy by looking at a graph. 4.) write a compound inequality from a real world situation. 2.6 Solve Compound Inequalities I can...

2.6 Solve Compound Inequalitiesorecreek.hartlandschools.us/subsites/Annette-Macfarlane...Notes 2.5.notebook 1 October 17, 2017 Warm-up: Solve each inequality, if possible. 1. 2x +

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Page 1: 2.6 Solve Compound Inequalitiesorecreek.hartlandschools.us/subsites/Annette-Macfarlane...Notes 2.5.notebook 1 October 17, 2017 Warm-up: Solve each inequality, if possible. 1. 2x +

Notes 2.5.notebook

1

October 17, 2017

Warm-up: Solve each inequality, if possible.1. 2x + 4 < 2(x - 6) 2. 6x + 3 > 6x - 5

1.) solve compound inequalities in one variable .2.) graph solutions of compound inequalities in one variable.3.) write a compound inequalitiy by looking at a graph.4.) write a compound inequality from a real world situation.

2.6 Solve Compound InequalitiesI can...

Page 2: 2.6 Solve Compound Inequalitiesorecreek.hartlandschools.us/subsites/Annette-Macfarlane...Notes 2.5.notebook 1 October 17, 2017 Warm-up: Solve each inequality, if possible. 1. 2x +

Notes 2.5.notebook

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October 17, 2017

2.6 Solve Compound InequalitiesA compound inequality consists of 

TWO separate inequalities joined by and or or.

–2 < x < 2                                 x ≤ –2   OR   x ≥ 2 All real numbers greater than –2  All real numbers less than or equal to –2

AND less than 2 OR greater than or equal to 2

Hint:  Always use < or < as long as the smaller number (minimum) is on the left and the larger number (maximum) is on 

the right!

The graph of a compound inequality

with and is the intersection 

of the graphs of the inequalities.

The graph of a compound inequality

with or is the union of the graphs

of the inequalities.

Example 1:  Write an inequality that is represented by the graph.a. b.

2.6 Solve Compound Inequalities♦ I can write a compound inequality by looking at a graph ♦

Page 3: 2.6 Solve Compound Inequalitiesorecreek.hartlandschools.us/subsites/Annette-Macfarlane...Notes 2.5.notebook 1 October 17, 2017 Warm-up: Solve each inequality, if possible. 1. 2x +

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Example 2:  An iguana needs to live in a warm environment.  The temperature in a pet iguana’s cage should be between 70°F and 95°F inclusive.  Write a compound inequality to show the temperatures that are within the recommended range.  Graph the solutions.

2.6 Solve Compound Inequalities♦ I can write a compound inequality from a real world situation ♦♦ I can graph solutions of compound inequalities in one variable ♦

Checkpoint:  The minimum speed on a highway is 40 miles per hour and the maximum speed is 60 miles per hour.  Write and graph a compound inequality that describes this situation.

2.6 Solve Compound Inequalities♦ I can write a compound inequality from a real world situation ♦♦ I can graph solutions of compound inequalities in one variable ♦

Page 4: 2.6 Solve Compound Inequalitiesorecreek.hartlandschools.us/subsites/Annette-Macfarlane...Notes 2.5.notebook 1 October 17, 2017 Warm-up: Solve each inequality, if possible. 1. 2x +

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October 17, 2017

Example 3:  Solve a compound inequality and graph your solution.

15 < –7x + 1 < 50 

2.6 Solve Compound Inequalities♦ I can solve compound inequalities in one variable ♦

Partner Check:  Solve and graph each compound inequality.2.    –12 < y – 8 ≤ –7 3.     16 > –4y ≥ –4 

2.6 Solve Compound Inequalities♦ I can solve compound inequalities in one variable ♦

Page 5: 2.6 Solve Compound Inequalitiesorecreek.hartlandschools.us/subsites/Annette-Macfarlane...Notes 2.5.notebook 1 October 17, 2017 Warm-up: Solve each inequality, if possible. 1. 2x +

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Example 4:  Solve 5x + 6 ≤ −9  or  2x −  8 > 12. Graph your solution.

2.6 Solve Compound Inequalities♦ I can solve compound inequalities in one variable ♦

Checkpoint.  Solve the compound inequality and graph your solution.  4.  9x +1 < −17 or 7x − 12 > 9 5.  10x – 3 < –23  or  4 – 3x < –5 

2.6 Solve Compound Inequalities♦ I can solve compound inequalities in one variable ♦