1. Algebraic Expressions and Models 1.2 Review simplifying and evaluating algebraic expressions.

2. Numerical expressions contain… 1. 2. 3. Numbers, operations, and grouping symbols

3. Exponentiation What is it? Raising to a power What is the base? What is the exponent? Why is this a short cut?

4. Will you get the same answer for both of these problems? Why or why not? Evaluate (-3) 4= -3 4 =

5. Order of Operation Where is Aunt Sally?

6. Using Order of Operation -8+5(1-(-3)) 3 312

7. Math Words Variable a letter that is used to represent one or more numbers. Value of the variable Any number used to replace a variable Value of the expression The result when the variables in an algebraic expression are replaced by numbers

8. Evaluate 5

9. Verbal and Algebraic Models You have $50 and are buying some DVD movies that cost $15 each. Write a verbal and Algebraic expression that shows how much money you have left after buying n movies. VerbalOrig. amt – price/DVD # of DVD Alg50 −15n

10. More Math words What are the terms in 2x+3? What is the coefficient of 4x 3 ? What are the like terms in 3x 2 + 4x−5x 2 +2? What are the constant terms in 3x 2 + 4x−5x 2 +2?

11. Simplify 11x 2n 2 +n -x+14

12. Gift You want to buy either a DVD or CD as a gift for each of 10 people. DVDs cost $13 each and CDs cost $8 each. Write an expression for the total amount you must spend. Then evaluate the expression when 4 of the people get DVDs. $/DVD #DVDs +$/CD #CDs

13. Assignment p. 22, 18-42 even, 43, 44, 46, 47