1. 9/18/14 Evaluating Expressions Textbook: 3-5 V & E p.124 DO NOW 1). What does it mean to substitute Solve if X = 3 and Y = 5 2). 3x3). Y - X 4). 2X/Y Simplify: 5). 3Y – Y + 2Y 6). X + 3X + 4 - 1

2. Announcements 1). Quiz tomorrow 2). Sign up for clinic Mon-Thur on the board AP

3. What are we doing Today OBJECTIVE: 1). Review Positive and Negative Integer Multiplication (this will be a section on tomorrow’s quiz). 2). WE WILL be able to translate and evaluate variables ESSENTIAL UNDERSTANDINGS: Some math problems look really hard, but we can do them all! We speak math and we simplify! AP

4. Review: Integer Multiplication - If the signs are the same (+, +) ( -, -) then the answer is positive - If the signs are different (+, -) (-, +) then the answer is negative 1). 8 x -6 =2). - 20 x -4 = 3). -1 x -1 = 4). -9 x -6 = 5). 4 x 5 = 6). -12 x -4 = AP

5. One Misunderstanding We cannot add a variable and coefficient to an integer. 6x + 3 ≠ 9x Think of it this way if X = 2 6 (2) + 3 = 15 9 (2) = 18 AP

6. Substitution: Watch me do this (learn & take notes!) Translate – Draw Arrows - Rewrite If A = 3, B = 1, C = 2 1). 2B 2). C + 33). 8A 5). (A/2) + 66). (A + B + C) x 2 AP

7. Math Gods of CR South Try! Translate & Evaluate the following expressions if G = 5 and H = 9 1). H + 2 + 12). 2H + G 3). H 4) 2G – H5). 2H/2 + 3G AP

8. Let’s Try Together 1). 4x + 6x – 3x + 2x (x = 2) 2). 5V + 2V + 3V + 10 (V = 1) 3). 3B – 10 – 2 + B + 4B – B (B=2) 4). a + 7 + 3 + a + a (a = 20) AP

9. Numbered Heads Question 1: 5 Points each 1). 6 x – 5 = 2). -10 x -10 = 3). 21 x -3 = AP

10. Numbered Heads Question 2: 10 Points Simplify and Evaluate: If A = 2 5A + 4A + 3A AP

11. Numbered Heads Question 3: 10 Points Simplify and Evaluate: If B = 2 and C = 3 4B – 2C + 4 AP

12. Numbered Heads Question 4: 10 Points Simplify and Evaluate: 4R + 4 + -2 + 2R + 10 = AP

13. Numbered Heads Question 3: 10 Points Simplify and Evaluate: 4R + 4 + -2 + 2R + 10 = AP

14. Numbered Heads Question 4: 10 Points Simplify and Evaluate: 4R + 4 + -2 + 2R + 10 = AP

15. Numbered Heads Question 5: 10 Points Simplify and Evaluate: X = 4 6X + 2X + 12 – 2 + X AP

16. Numbered Heads Question 6: 5 Points each What is a variable? What is the meaning of substitute? AP