4.3 The Multiplication Property of Inequality - PowerPoint PPT Presentation

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4.3 The Multiplication Property of Inequality

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4.3 The Multiplication Property of Inequality Goal: To solve inequalities using the multiplication property Multiplication Property of Inequalities For all rational ... – PowerPoint PPT presentation

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Title: 4.3 The Multiplication Property of Inequality


1
4.3 The Multiplication Property of Inequality
  • Goal To solve inequalities using the
    multiplication property

2
Multiplication Property of Inequalities
  • For all rational numbers a, b, and c
  • When c is positive,
  • if a gt b, then a c gt b c
  • When c is negative,
  • if a gt b, then a c lt b c

3
If you multiply or divide an inequality by a
negative number, reverse the inequality sign in
the answer.
4
(No Transcript)
5
Check It Out!
Solve the inequality and graph the solutions.
Check your answer.
10 x
divide both sides by 1 to make x positive.
Change ? to ?.
1(10) 1(x)
10 x
6
Check It Out!
Solve the inequality and graph the solutions.
Check your answer.
10 x
7
Solve for y, then graph the solution.
-3y ? 12
-3
-3
y ? -4
?
8
Solve for y, then graph the solution.
-4y ? 16
y ? -4
9
Solve for y, then graph the solution.
3y ? -15
y ? -5
10
Solve for y, then graph the solution.
-5y ? -20
y ? 4
11
Solve the inequality and graph the solutions.
24 ? x
(or x ? 24)
12
Assignment Pg 182 (2-42) even
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