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Algebraic Expressions and Models 1.2

Algebraic Expressions and Models 1.2. Review simplifying and evaluating algebraic expressions. Numerical expressions contain…. 1. 2. 3. Numbers, operations, and grouping symbols. Exponentiation What is it?. Raising to a power What is the base? What is the exponent?

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Algebraic Expressions and Models 1.2

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  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. ExponentiationWhat 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= -34 =

  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. Verbal Orig. amt – price/DVD • # of DVD Alg 50 −15n

  10. More Math words What are the terms in 2x+3? What is the coefficientof 4x3? What are the like terms in 3x2 + 4x−5x2 +2? What are the constant terms in 3x2 + 4x−5x2 +2?

  11. Simplify 11x 2n2+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

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