1. Todays Plan: -Entry Task & Correct Homework -Variables and Expressions -Practice Learning Target: -I will evaluate algebraic expressions. Entry Task 9/14/10 Variables and Expressions Evaluate. 1. 5(7) – 1 2. 7(18 – 11) 3. 22 + 17 8 + 3 4. 36 + 15(40 – 35) 34 49 161 111

2. Todays Plan: -Entry Task & Correct Homework -Variables and Expressions -Practice Learning Target: -I will evaluate algebraic expressions. 9/14/10 Variables and Expressions Classify the following as expressions or equations. Use the examples as a guide. ExpressionsEquations y + 3 – 56 ÷ 2 + y = 3 2 + 3 -10 x + 3 - y 4 ÷ 2 f ÷ 2 +1= 2 4 × 10 = 40 n × p = w n × p + w

3. Evaluate k + 9 for each value of k. Course 2 2-7 Variables and Algebraic Expressions A. k = 5 k + 9 5 + 9 14 Substitute 5 for k. Add. B. k = 2 k + 9 2 + 9Substitute 2 for k. 11 Add.

4. Insert Lesson Title Here Course 2 2-7 Variables and Algebraic Expressions Evaluate a + 6 for each value of a. A. a = 3 a + 6 3 + 6 9 Substitute 3 for a. Add. B. a = 5 a + 6 5 + 6Substitute 5 for a. 11 Add.

5. Insert Lesson Title Here Course 2 2-7 Variables and Algebraic Expressions Evaluate. A. a = 4 5 - a + 6 B. a = 5 5 - a + 6

6. Course 2 2-7 Variables and Algebraic Expressions REMEMBER: Multiplication and division can be written in different ways. MultiplicationDivision 7t 7 · t 7(t) 7 t t 2 t ÷ 2 t/2t/2 ab a · b a(b) a b srsr s ÷ r s/rs/r

7. Todays Plan: -Entry Task & Correct Homework -Variables and Expressions -Practice Learning Target: -I will evaluate algebraic expressions. 9/14/10 Variables and Expressions 4x for x=2 Evaluate.

8. Evaluate the expression for the given value of the variable. Additional Example 2A: Evaluating Algebraic Expressions Involving Order of Operations Course 2 2-7 Variables and Algebraic Expressions A. 4x – 3 for x = 2 4(2) – 3 8 – 3 5 Substitute 2 for x. Multiply. Subtract.

9. Try This: Example 2A Insert Lesson Title Here Course 2 2-7 Variables and Algebraic Expressions Evaluate each expression for the given value of the variable. A. 3x – 2 for x = 3 3(3) – 2 9 – 2 7 Substitute 3 for x. Multiply. Subtract.

10. Todays Plan: -Entry Task & Correct Homework -Variables and Expressions -Practice Learning Target: -I will evaluate algebraic expressions. 9/14/10 Variables and Expressions Assignment #6 Variables and Expressions: pg 94 #1-15 Quietly get a book and start your work.