Aim: 1.4 How do we transpose equations and formulas! 1.7 How do we solve absolute value equations and why must we always check our solution(s)!?

Warm-Up:1) Find the error in Sarah’s work and explain

what she did wrong in 1-2 sentences! 2) Show Sarah how to do this problem correctly!

Agenda: Review of HW1.2Transposing equations and formulasAbsolute value equationsStudent Portfolios

More Linear Equation Review

1) 2) 3) 4) 5)

)4(210 x 105

2z1293 zx222 1375 z

Transposing Equations and Formulas

Example 1:

Transposing Practice

2. 5y – x = 13 3. 3x + 2y = 12

Transposing Challenges4. 5.

Aim: 1.7 How do we solve absolute value equations and why must we always check our solutions?

x = ?

The absolute value of a number is the distance that number is from zero on the number line.

Solving Absolute Value Equations

Example 2)75 x

Practice Solving Absolute Value EquationsExample 3)

5423 ww

1132 q

xx 724

1.

2.

3.

xx 4122

HW 1.3 – #30 – 39 on p. 55

Warm-Up: Graph the inequalities below and write them out in words!

x > 2

1.6 How are the rules for solving linear inequalities similar to the rules for solving linear equations? How are they different?

Agenda:PortfoliosLinear inequalities and their graphsReview Centers!

1x

x43x

The Four Symbols

3x

3x

3x

3x

Compound Inequalities consist of two inequalities joined by “and” or “or”

Practice Graphing Inequalities

How are the rules for solving linear inequalities similar to the rules for solving linear equations? How are they different?

47 x 13 x10

2

1x

155 x 459 x 17 x

4725 xx

Review Concept Centers!

3

42

1.Evaluating and Simplifying Expressions

2. Solving Linear Equations

3. Transposing Equations

4. Solving Absolute Value Equations

5. Solving linear Inequalities

HW 1.4- Review for Quiz!

To Prepare go to the CHAPTER REIVEW section in your textbook, pages 61 – 64 and do the exercises below:

1.2 evaluating and simplifying alg. Expressions, #10-15

1.3 Solving linear equations, #17 - 22

1.4 Transposing equations, #25 – 30

1.7 Solving absolute value equations, #41 – 43

1.6 Solving linear Inequalities, #34 - 39

Exit Slip / Summary

Just by looking at them, how many solutions do you think there are for each equation below?

Linear Equation Abs. Value Equation3x - 15 = 75 I 3x - 15 l = 75

Now solve them to see if you were correct!