1. Lesson 3.5 Solving Inequalities Using Multiplication or Division 10/19/09

2. How does multiplication or division affect an inequality? -1 < 5 2 2 -2 < 10 True, but...

3. How does multiplication or division affect an inequality? -1 < 5 -2 -2 -1 < 5 -2 -2 2 < -10 ?????????

4. If you multiply or divide each side of an INEQUALITY by a NEGATIVE number, you MUST reverse the direction of the inequality symbol.

5. > -5 < k 40 36 38 40 42 44 k -8 -8 -8 k 6 > -7 6 6 k -42 > -48 -46 -44 -42 -40

6. On average, a customer service representative helps at most 160 customers during an 8-hour workday. Write and solve an inequality to find the average number of customers c she can help each hour during one of her workdays. 8c160< 88 C 20 < She can help 20 customers or less each hour.