1. Do Now 10/14/09 Take out HW from last night. Take out HW from last night. Punchline worksheet 38 Punchline worksheet 38 Copy HW in your planner. Copy HW in your planner. Text page 99, #8 – 32 evens Text page 99, #8 – 32 evens In your journal, explain how you think you would solve the following equations. Then solve. In your journal, explain how you think you would solve the following equations. Then solve.

2. Homework Punchline worksheet 38 “What Do Opticians, Optometrists, and Opthamologists Have In Common?” THEY ALL WENT TO EYE SCHOOL

3. Objective SWBAT use multiplication and division to solve equations

4. Equation- mathematical sentence with an equal sign Like a scale, both sides must be balanced

5. Equation Like a scale, the left side and right side must be the same in order to be balanced! Like a scale, the left side and right side must be the same in order to be balanced! + 7 = 10 Left side Right side x ‘x’ has to be 3 in order to make the equation balanced.

6. Section 2.6 “Solving Equations Using Multiplication and Division” How can you get the “unknown” by itself? How can you get the “unknown” by itself? “Undo” the operation by using the INVERSE operation to both sides of the equation. -2y = 28 -2y = 28

7. Solving a Multiplication Equation -2y = 28 -2 -2 -2 -2 y = -14 “Undo” multiplication by dividing both sides of the equation

8. Check Your Work! -2y = 28 y = -14 -2(-14) = 28 Are both sides equal?

9. Try It Out 1). -7t = 63 2). -144 = 12d 3). 10x = 5 1). t = -9 -7(-9) = 63 2). d = -12 -144 = 12(-12) 3). x = ½ 10(½) = 5

10. Solving a Division Equation j = -7 5 5· · 5 j = -35 “Undo” division by multiplying both sides of the equation

11. Check Your Work! j = -7 5 j = -35 Are both sides equal? -35 = -7 5

12. Try It Out 1). r = -16 -16 ÷ 8 = -2 2). v = 32 32 = 8 4 3). a = -45 -9 = -45 5 1). r ÷ 8 = -2 2). v = 8 4 3). -9 = a 5

13. Find the width of the rectangle. Area = 38 cm² x 2 Area = 27 m² z 9 x = 19 cm z = 3 m 2x = 38 cm² 9z = 27 m²

14. Homework Text page 99, #8 – 32 evens Text page 99, #8 – 32 evens

15. WAR!!! Using your boards solve the equations as fast as possible. If your number is called … you are at WAR!!