Multiplication and Division Inequalities with Positive Numbers

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Presentation transcript:

Multiplication and Division Inequalities with Positive Numbers 13.3 Multiplication and Division Inequalities with Positive Numbers How can you solve an inequality involving multiplication or division with positive numbers?

ADDITIONAL EXAMPLE 1 Solve each inequality. Graph and check the solution. A B

ADDITIONAL EXAMPLE 2 Kayla earned more than $50 babysitting. Her mother paid her $4 an hour to babysit her little brother. Write and solve an inequality to find the possible number of hours Kayla babysat. 4h > 50; h > 12.5; Kayla babysat more than 12.5 hours.

13.3 LESSON QUIZ Solve each inequality. Graph and check the solution. 1. 2.

Solve each inequality. Graph and check the solution. 3. 4.

Write and solve an inequality for each problem. 5. Kellin pays more than $40 a day to rent a canoe. What amount might he pay to rent the canoe for a 7-day trip? 6. Amanda earns $15 an hour. She needs at least $90 to buy a computer desk. How many hours does she need to work to buy the desk?

How can you solve an inequality involving multiplication or division with positive numbers? Sample answer: You can use the Multiplication and Division Properties of Inequality: multiply or divide each side by the same positive amount to isolate the variable.