1. Do Now 10/23/09 TTTTake out HW from last night. ““““Food Consumption” worksheet CCCCopy HW in your planner. TTTText page 122-123, #8-18 evens, #24-32 evens, #36 IIIIn your journal, answer the following question. SSSSally Sue just received her cable bill from Comcast. The bill for the month is a total of $114.50. Comcast charges $5.00 for each movie ordered “On Demand.” Sally Sue can’t remember how many “On Demand” movies she ordered in the month? If Sally Sue’s normal bill is $89.50, how many “On Demand” movies did she order? CCCCan you think of an equation to help you solve this question? Use the variable “m” for movies.

2. “You Are What You Eat” 25 year-old man 66 66 + (13.7)(180)(0.45)  +1109.7 weight + (5)(70)(2.54)  + 889 height – (6.8)(25)  - 170 age + (30)(11.3)  + 339 basketball + (30)(17)  + 510 running + (2000)(0.1)  + 200 digestion Total Calories Needed 2943.7 25 year-old woman 655 655 + (9.6)(120)(0.45)  +518.4 weight + (1.7)(64)(2.54)  + 276.352 height – (4.7)(25)  - 117.5 age + (45)(7.4)  + 333 aerobics + (30)(6.5)  + 195 walking + (2000)(0.1)  + 200 digestion Total Calories Needed 2060.252

3. Objective  SWBAT solve two-step equations using algebra Did you know your cell phone bill can be calculated from a two-step equation?

4. 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! + 8 = 20 Left side Right side s ‘s’ has to be 6 in order to make the equation balanced. 2 Remember this?

5. Equation-  mathematical sentence with an equal sign Like a scale, both sides must be EQUAL in order to be balanced. Remember this?

6. Section 3.1 “Solve Two-Step Equations” How can you get the “unknown” by itself? How can you get the “unknown” by itself? “Undo” operations by using the INVERSE (opposite) operations to both sides of the equation. Solving Two-Step Equations STEP 1- “Undo” addition and/or subtraction. STEP 2- “Undo” multiplication and/or division. STEP 3- Solve for the variable. STEP 4- Check your work. 3x + 5 = -19

7. Solving Two-Step Equations… 3x + 5 = -19 - 5- 5- 5- 5 -5-5-5-5 3x = -24 3x = -24 Isolate the variable! Get ‘x’ by itself. To get the ‘x’ by itself first get rid of “adding 5.” Do the opposite. “Subtract 5.” Whatever you do to one side of the equation you must do the other side. 33 x = -8 x = -8 To get the ‘x’ by itself get rid of “multiplying by 3.” Do the opposite. “Divide by 3.”

8. Check Your Work! 3x + 5 = -19 x = -8 3(-8) + 5 = -19 Are both sides equal?

9. “Two-Step” Millionaire

10. Homework Text page 122-123, #8-18 evens, #24-32 evens, #36