Warm Up

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Warm Up
Lesson Presentation
Lesson Quiz- EXIT EXAM
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Warm Up Solve each equation.
1. 2x 5 17 2.
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Solve each inequality and graph the solutions.
t gt 4
3. 5 lt t 9
4.
a 8
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Objective
Solve inequalities that contain more than one
operation.
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Solve the inequality and graph the solutions.
A. 12 3x 6
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Solve the inequality and graph the solutions.
B.
Clear the fraction first! (Undo the division)
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Simplifying Before Solving Inequalities
C. 3 2(x 4) gt 3
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D.
Clear the fraction!
Multiply both sides by 8, the LCD of the
fractions.
Distribute 8 on the right side.
5 lt 3x 2
Since 2 is subtracted from 3x, add 2 to both
sides to undo the subtraction.
2 2
7 lt 3x
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Example D, Continued
7 lt 3x
Since x is multiplied by 3, divide both sides by
3 to undo the multiplication.
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Application Problem
The average of Jims two test scores must be at
least 90 to make an A in the class. Jim got a 95
on his first test. What grades can Jim get on his
second test to make an A in the class?
Let x represent the test score needed. The
average score is the sum of each score divided by
2.
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Application Continued
Clear the fraction!!
Since 95 x is divided by 2, multiply both sides
by 2 to undo the division.
95 x 180
Since 95 is added to x, subtract 95 from both
sides to undo the addition.
x 85
The score on the second test must be 85 or
higher.
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Homework Page 191 1-15 37 51-54 83-86 Due
Thursday 10/29/09 Exit slip required before you
leave today!
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Lesson Quiz Part I
Solve each inequality and graph the solutions.
1. 13 2x 21
x 4
2.