LESSON

How can you solve an inequality involving multiplication or division with positive numbers?

Multiplication and Division Inequalities with Positive Numbers

13.3

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

A

B

ADDITIONAL EXAMPLE 2Kayla 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 morethan 12.5 hours.

13.3 LESSON QUIZ

Solve each inequality. Graph and check the solution.

6.10.A

1.

2.

3.

4.

Solve each inequality. Graph and check the solution.

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?

5.

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?

Write and solve an inequality for each problem.

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.