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Fill in the blank with <, >, or = to make each statement true.
1 finger if < 2 fingers if > 3 fingers if = 2 3
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5 4 1 finger if < 2 fingers if > 3 fingers if =
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3 -5 1 finger if < 2 fingers if > 3 fingers if =
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1 finger if < 2 fingers if > 3 fingers if = -2 -5 -6
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-7 -4 1 finger if < 2 fingers if > 3 fingers if =
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1 finger if < 2 fingers if > 3 fingers if =
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Thumb down if not a solution
x < 3 Is a solution? Thumb up if yes Thumb down if not a solution
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Thumb down if not a solution
x < 3 Is a solution? Thumb up if yes Thumb down if not a solution
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Graph the solution of x < 3
2.999 -2 -6 -4 6 4 2 -2 -6 -4 6 4 2
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Graph the solution of x + 3 = 7
-2 -6 -4 6 4 2
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Graph the solution of x -2
-6 -4 6 4 2
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Graph the solution of x |-2|
-6 -4 6 4 2
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Inequalities “less than or equal to” “less than” “greater than”
“greater than or equal to”
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QQ. Write the equation for each graph
1 2 3 4 5 -2 -6 -4 6 4 2 -2 -6 -4 6 4 2 -2 -6 -4 6 4 2 -2 -6 -4 6 4 2 -2 -6 -4 6 4 2
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Inequalities vs. Equations Solutions
Inequality Equation x + 5 9 x + 5 = 9 x = 4 x = 4 x = 5 x = 6 x 4
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Addition Property of Inequalities
13 < 25 +2 +2
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Addition Property of Inequalities
13 < 25 +100 +100
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Addition Property of Inequalities
13 < 25 -13 -13
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Addition Property of Inequalities If a < b, then a + c < b + c
“If I add the same number to both sides of an inequality, I get another TRUE inequality in the same direction.” The same is true for >, , and
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Solve for “x”and graph: 5x + 2 4x + 7
-4 -8 8 4
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Solve for “x”and graph: -2(x - 7) > 2x - 6
Check with ZERO -4 -8 8 4
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Solve for “y”, then graph the solution.
-2 -6 -4 6 4 2
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Solve for “y”, then graph the solution.
-3 -3 y -4 -2 -6 -4 6 4 2
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3 < 5 (-3) (-3) -9 < -15 ??? -9 > -15
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Multiplication Property of Inequalities
For all rational numbers a, b, and c: When c is positive, if a > b, then a • c > b • c When c is negative, if a > b, then a • c < b • c If you multiply or divide an inequality by a negative number, reverse the inequality sign in the answer.
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If you multiply or divide an inequality by a negative number, reverse the inequality sign in the answer.
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Solve for “y”, then graph the solution.
-3 -3 y -4 -2 -6 -4 6 4 2
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Solve for “y”, then graph the solution.
-2 -6 -4 6 4 2
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QQ: Solve for x. Graph # 4 3x 18 14x -7 -8x > 32 -5x < 30
A,C,E,G B,D,F 1 3x 18 14x -7 2 -8x > 32 -5x < 30 3 9x -3 7x > 49 4 -6x < -36 -4x -24
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2-Step Inequalities 6 + 5y > 21 -6 + 6 + 5y > -6 + 21 5y > 15
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7x + 4 4x + 16 x 4 -2 -6 -4 6 4 2
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13a + 5 12a + 4 -2 -6 -4 6 4 2
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4m – 4 > 8 + 2m -2 -6 -4 6 4 2
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-6x + 7 – x + 1 < 2x + 4 -7x + 8 < 2x + 4 +7x - 4 - 4 +
-2 -6 -4 6 4 2
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Assignment Page 184 # 1-31 odd, 32-48 even
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