1. Do Now (www.bbc.co.uk) The world’s largest floating Christmas tree was finished on December 1 st, 2014. It is floating in the Rodrigo de Freitas Lagoon in Brazil. 1.) Simplify to find how many meters high the tree is: 2.) Find:, which is the # of tons the tree weighs. 3.) This is about the weight of small cars. 85 meters 500 tons 1000 cars

2. Do Now Evaluate each expression if a=4, b=15, and c=9 1.) b 2 – 5c 2.) 4b ÷ 5 3.) 2ac 180 12 72

3. 12/11/2014 5-1D Algebra: Write Expressions

4. Method - define the variable- choose a variable - decide what the variable represents

5. Example 1 Write the phrase two dollars less than the price of a movie ticket as an algebraic expression. The expression is m – 2.

6. Example 2 Write the phase five years less than her aunt’s age as an algebraic expression. The expression is a – 5.

7. Example 3 Sheri made a certain number of bracelets for the craft fair. Mika made 5 less than three times the number of bracelets that Sheri made. Write an expression to represent the number of bracelets Mika made. The expression is 3b – 5.

8. Example 4 The library has five times the amount of books that a local store has on display. 5b

9. Ex. 5 One third of the points that the Beach scored ⅓p or p ÷ 3

10. Ex. 6 A plumber charges $50 to visit a house plus $40 for every hour of work. Define a variable and write an expression to represent the total cost of hiring a plumber. 40h + 50

11. Exit Ticket 1.) 9s 2.) e + 6 3.) n – 7 4.)3n + 4

12. Homework Pg. 284 #1-16 Evens TenMarks assignment due tomorrow (written work and electronic portion)