3.3 SOLVING INEQUALITIES BY MULTIPLYING OR DIVIDING

I can solve inequalities by multiplying or dividing.

Multiplication and Division Properties of Inequality

If you multiply or divide each side of an inequality by the same positive number, the direction of the inequality symbol remains unchanged.

Multiplication and Division Properties of Inequality

If you multiply or divide each side of an inequality by the same negative number, the direction of the inequality symbol is reversed.

Practice

-3y ≤ -27

y ≥ 9

Application Your class is taking a trip to a museum that

is 190 miles away. The bus can travel up to 55 miles per hour. At least how many hours should your class plan for the trip?

Divide by 55: h ≥ 3.4545… Round up h ≥ 3.5 hours Your class should plan to drive at least 3.5

hours.

Assignment

Odds Only P. 112 #7-29