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Name:________________ Block: _______ Unit 2 Inequalities 2.1 Graphing and Writing Inequalities 2.2 Solving by Adding and Subtracting 2.3 Solving by Multiplying and Dividing 2.4 Solving TwoStep and MultiStep Inequalities 2.5 Solving Inequalities with Variables on Both Sides 2.6 Solving Compound Inequalities 2.7 Solving Absolute Value Inequalities 2.1 Graphing and Writing Inequalities Standards: A.REI.3 Objectives: Students will be able to

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Page 1: Name: Block: Unit 2 Inequalitieslsteers.weebly.com/uploads/3/7/5/9/37590091/unit2notepacket... · 2.2 Solving by Adding and Subtracting 2.3 Solving by Multiplying and Dividing 2.4

Name:________________ Block: _______ 

Unit 2 Inequalities 2.1 Graphing and Writing Inequalities  2.2 Solving by Adding and Subtracting  2.3 Solving by Multiplying and Dividing  2.4 Solving Two­Step and Multi­Step Inequalities 2.5 Solving Inequalities with Variables on Both Sides 2.6 Solving Compound Inequalities 2.7 Solving Absolute Value Inequalities   2.1 Graphing and Writing Inequalities Standards:  A.REI.3 Objectives:  Students will be able to 

●  

Identify solutions of inequalities in one variable
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●   Essential Question:    Do Now:  

 

Vocabulary:  

Term  Definition  Example 

Inequality      

Solution of an inequality  

     

 

 Identifying Solutions of Inequalities  Example 1) Describe the solutions of 3+x<9 in words.   Let’s test values of x to see when the inequality will be true  

Write and graph inequalities in one variable.
a statement that two quantities are not equal
any value of the variable that makes the inequality true
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x           

3+x           

3+x<9           

Solution?           

______________________________________________________________________________________________________________________________________________________________.   Example 2) Describe the solution of 2p<8 in words.      Graphing Inequalities  

 *A closed circle means _______________________________________.  *An open circle means ________________________________________.  Example 1) Graph  −  b > 3  

-3
0
4
6
7
The solutions are any real numbers less than 6.
The solutions are all real Number less than 4.
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  Example 2) Graph   x ≤ 4   

  Example 3) Graph  −  y ≥ 4 + 5   

  Example 4) Graph  (3 )a > 2

1 − 1   

  Writing an Inequality from a Graph   Write an inequality shown by the graph   Example 1)  

  Example 2)  

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    Example 3)  

    Example 4)  

    Exit Ticket   

  

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2.2  Solving Inequalities By Adding or Subtracting 

Standards:  A.REI.3 Objectives:  Students will be able to 

●   

●   Essential Question:    Do Now:  

 

 

 Let’s test this…. 

Solve one step inequalities involving addition and subtraction
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 Using Addition and Subtraction to Solve Inequalities  Solve each inequality and graph the solutions.  Example 1)  6 x + 9 < 1   

 Example 2)  x − 5 ≥ 3    

 Example 3)  −  − 4 + a ≤ 2    

Example 4)    − 0 − 3 + y < 1     

 Example 5)  .3 .6 x + 4 ≥ 5     

 

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Real World Applications  Example 1) 

         Example 2)  

        Exit Ticket   

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2.3           Solving Inequalities by Multiplying or Dividing 

Standards:  A.CED.1, A.REI.3 Objectives:  Students will be able to 

●   

●   Essential Question:   Do Now:  

 

 

 Let’s test this out… 

Solve one step inequalities involving multiplication and division
Page 10: Name: Block: Unit 2 Inequalitieslsteers.weebly.com/uploads/3/7/5/9/37590091/unit2notepacket... · 2.2 Solving by Adding and Subtracting 2.3 Solving by Multiplying and Dividing 2.4

Multiplying or Dividing by a Positive number  Just like solving inequalities using addition and subtraction, solving ______________________________________________________________________________________________________________________ is the same thing as solving equations.   Solve the inequalities and graph the solutions.  Example 1)  x − 6 4 > 1    

 Example 2)  −5

x ≤ 1    

 Example 3)  −2

y < 3    

  Example 4)  9.5x4 ≥    

  

Inequalities using multiplication and division of positive numbers
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 Multiplying or Dividing by a Negative Number  What happens when we multiply or divide both sides of an inequality by a negative number? 

      

 Solve each inequality and graph the solutions.  Example 1)  x 4 − 7 > 1    

   

WHEN YOU MULTIPLY OR DIVIDE BOTH SODES OF AN INEQUALITY BY A NEGATIVE NUMBER, YOU MUST FLIP THE INEQUALITY SIGN!!
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 Example 2)  −x

−3 < 3     

 Example 3)  .1x .3− 3 ≤ 9     

 Example 4)  −6

−x ≥ 1     

   Exit Ticket   

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 2.4           Solving Two­Step and Multi­Step Inequalities 

Standards:  A.CED.1, A.REI.3 Objectives:  Students will be able to 

●   

●   Essential Question:   Do Now:  

 

 Solving Two­Step and Multi­Step inequalities is just like solving two­step and multi­step equations, but remember that when you multiply or divide by a ______________________________, you must __________________________________________________________.  Solving Multi­Step Inequalities  Solve the inequality and graph the solutions.  Example 1)  v − 3 − 8 + 9 > 5     

Solve and graph two-step and multi-step inequalities
Negative number
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 Example 2)  −− 8 ≥ v − 3     

  Example 3)  −4

6+n > 2      

  Example 4)   −  − 5 + 8

k ≤ 7     

  Simplifying before Solving Inequalities  Solve each inequality and graph the solutions.  Example 1)  0 (b ) − 9 > 6 − 6     

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 Example 2)  (r ) − 0 4 − 7 ≥ 2     

  Example 3)  06 − (5n )2 > 4 + 5 + 7     

  Example 4)  −b − 3

5 + 41 < 5

12     

  Exit Ticket  

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2.5 Solving Inequalities with Variables on Both Sides 

Standards:  A.CED.1, A.REI.1, A.REI.3 Objectives:  Students will be able to 

●   

●   Essential Question:   Do Now:  

 

Solving Inequalities with Variables on Both Sides  Solve the inequality and graph the solutions.  Example 1)  6 r− 1 − 7 < r     

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 Example 2)  v − v− 4 + 8 > 8     

 Example 3)  n 0  − 3 − 1 ≤ n + 6     

 Example 4)  v v 61 − 2 < 3 + 1     

  Simplifying Each Side Before Solving  Solve each inequality and graph the solutions.  Example 1)  (2 a) 6 a 8 + 6 ≥ 1 − 6     

 Example 2)  (a ) − a 4− 4 − 7 > 4 + 3  

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 Example 3)  x (3 x)6 < 6 + 4      

  Example 4)  0 b − (5b )− 3 − 8 ≤ 6 − 6     

  All Real Numbers as Solutions or No Solutions *Some inequalities are true no matter what value is substituted for the variable. For these inequalities, the solution is _____________________.  *Some inequalities are false no matter what value is substituted for the variable. For these inequalities, there ____________________________.  Solve each inequality.  Example 1)   x + 5 ≥ x + 3    

All real numbers
No solution
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 Example 2)  (x ) x 2 + 3 < 5 + 2    Exit Ticket   

1.6           Solving Compound Inequalities  Standards:  A.REI.3 Objectives:  Students will be able to 

●   

●   Essential Question:   Do Now:  

 

 Vocabulary:  

Term  Definition  Example 

Compound Inequality        

Solve compound inequalities
When 2 inequalities are combined Into 1 with AND or OR
Graph the solution sets of compound inequalities
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Intersection       

Union      

 

 Solving Compound Inequalities Involving AND Example: We want to graph the solutions of x<10 and x>0.  First draw a venn diagram to see some solutions. Then graph the solutions to both inequalities. The intersection of the graph shows the numbers that are ___________________________________________. 

 Solve each inequality and graph the solutions.  Example 1) 4 ≤ x + 2 ≤ 8       

The numbers that are solutions Of both inequalities
The numbers that are solutions of Either inequality
Solutions of both inequalities
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  Example 2)  x− 2 ≤ 2 + 3 ≤ 9   

  Example 3)  n 1− 4 ≤ 3 + 5 < 1      

  Solving Compound Inequalities Involving OR We want to find the solutions for the inequalities x>10 or x<0. First draw a Venn diagram to see the solutions of each inequality. Then graph the solutions of each inequality. The union will show the solutions of __________________________________________________________.  

 Example 1)   or  −− 4 + a > 1 − 4 + a < 3    

Either inequality
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 Example 2)  x  or 3x 22 ≤ 6 > 1  

  Example 3)  x 1 or 2x −7 > 2 < 2      

  Writing a Compound Inequality from a Graph  Example 1) 

 Does this inequality involve AND or OR? Are there open or closed circles?   Example 2) 

   Does this inequality involve AND or OR? Are there open or closed circles?  Exit Ticket  

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1.7           Solving Absolute Value Inequalities   

Standards:  A.CED.1, A.REI.3 Objectives:  Students will be able to 

●   

●   Essential Question:   Do Now:  

 

Solving Absolute Value Inequalities Involving < 

Solve inequalities in 1 variable involving absolute value expressions
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 Solve each inequality and graph the solutions  Example 1)  2 x| | + 3 < 1   

  Example 2)   || 7

n || < 5       

  Example 3)  6 − b| 4 | ≤ 3       

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  Example 4)  05 6n| | ≤ 6      

   Solving Absolute Value Inequalities Involving > 

 Example 1)  a| + 7| ≥ 1      

  

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Example 2)  k| − 2| − 2 > 9      

   Example 3)  || 4

p || > 3     

   Example 4)  0− x| 2 | + 4 ≥ 2     

  Special Cases of Absolute­Value Inequalities  *If you get a statement that is true for all values of a variable, ____________________ are solutions of the original inequality.  *If you get a false statement when solving an absolute­value inequality, the original inequality ________________________________________>  Example 1)  − 1x| | − 9 ≥ 1   

All real numbers
Has no solutions
Absolute value expressions are always nonnegative. Therefore, The statement is true for all values of x.
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  Example 2)  −4 x .5| − 3 | ≤ 8      Exit Ticket   

Points for Unit 2 2.1 Graphing and Writing  Inequalities 

/5 2.2 Solving by Adding and Subtracting 

/5 2.3 Solving by Multiplying and Dividing 

/5 2.4 Solving Two­Step and Multi­Step Inequalities /5 

Absolute value expressions are always nonnegative. Therefore, the statement is false for all values of x.
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2.5 Solving Inequalities with Variables on Both Sides /5 2.6 Solving Compound  Inequalities /5 2.7 Solving Absolute Value Inequalities 

/5 Total     /35