Review Quiz

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Review Quiz 1
Solve each inequality.
1) -2x 8
2) 5x 2 8x - 1
3) -24 -6x
4) 2(x 2) - 3 4x - 5
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Remember . . . . . .
3 Methods to Solve Systems
Substitution Linear Combinations (Elimination)
Graphing
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First semester you learned that the graph of a
linear equation ax by c is a straight line.
y -x 1
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The graphs of two linear equations (two straight
lines) in the same coordinate plane must show one
of the following 1. Intersect in one
point 2. Intersect in no point 3.
Intersect in unlimited number of points
(-2,1)
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1. y 2x - 3 -y 2x - 1
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2. 6x 2y 16 -2x y -2
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3. 4x - y 10 -2x 4y 16
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Pg. 402 20 - 23, (25 - 31 odd)
20) y -x 3 y x 1
21) y -6 x 6
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22) y 2x - 4 y - x 1
1
2
23) 2x - 3y 9 x -3
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25) x - y 1 5x - 4y 0
27) 7y -14x 42 7y 14x 14
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29) 15x - 10y -80 6x 8y -80
31) x - 8y -40 -5x 8y 8
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Solving Systems of Linear Inequalites
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Overview of Graphing
1) Write the inequality in slope -intercept
form. 2) Draw the line - Remember gt or lt
should be dashed or
should be solid. 3) Use (0,0) to determine
where to shade.
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Where do I shade?
Graph x lt 1
Test Point (0,0)
true / false
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Where do I shade?
Graph 7 - y gt 5
Test Point (0,0)
true / false
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You try!
Test Point (0,0)
true / false
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1.
Graph 2y gt 1
Test Point (0,0)
true / false
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Graph 2x 4y 4
3.
Test Point (0,0)
true / false
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Graphing Systems of Inequalities
y x - 2
y lt 2x - 4
-1
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Answer
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MATCH THE SYSTEM OF LINEAR INEQUALITIES WITH ITS
GRAPH
A. 2x y lt 4 -2x y lt 4
C. 2x y lt 4 2x y gt -4
B. 2x y gt -4 x - 2y lt 4
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15) 2x y gt 2 6x 3y lt 12
16) 2x - 2y lt 6 x - y lt 9
17) x - 3y 12 x - 6y 12
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Complete Book Work
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