Multiply or divide by a negative *Reverse the inequality symbol To solve inequalities using multiplication and division:   EXCEPT WHEN YOU . . . REMEMBER! Solve each inequality. Graph and check your solution. Multiplication Property of Inequality: 1. 2. Division Property of Inequality: 3. 4. Use normal algebra skills and bring down inequality symbol Multiply or divide by a negative *Reverse the inequality symbol x needs to be on the left to graph Multiply each side by the same value. *Reverse the inequality if you multiply by a negative. Divide each side by the same value. *Reverse the inequality if you divide by a negative.

What’s that you say?  SWITCH, SWITCH, SWITCH THE SIGN … SWITCH THE INEQUALITY!!   Define a variable and write an inequality from the scenarios below to solve the problem. 5. Students in the school band are selling calendars. They earn $.40 on each calendar they sell. Their goal is to earn more than $327. What is the fewest number of calendars they can sell and still reach their goal? 6. The student council votes to buy food for a local food bank. A case of 12 jars of spaghetti sauce costs $13.75. What is the greatest number of cases of sauce the student council can buy if they use at most $216 for this project? 7. Suppose you earn $6.15 per hour working part time at a dry cleaner. How many hours must you work to earn at least $100?