ALGEBRAIC EXPRESSIONS BY LEXI

Objectives that come with algebraic expressions are: Evaluate expressions Simplify expressions To evaluate is to substitute a number for each variable in the expression. Simplify by order of operations.

You can display real life quantities using algebraic expressions For example: What algebraic expression models the word phrase eight fewer than x? X-8 Why? Fewer suggests subtraction. Therefore represented by x-8

YOU CAN ALSO MODEL A SITUATION Ex. Zoe started out with 250$. She spends 5$ each day. What algebraic expression models this situation? 250-5d Relate starting amount minus amount spent times # of days Define * d

EVALUATING ALGEBRAIC EXPRESSIONS 4(x-8) +4b for a=2, b=3 4(2-8)+4(3)

TERMS An expression that is a number, a variable, or the product of a number and one or more variables is a term. A coefficient is the numerical factor of a term. A constant term is a term with no variables. -8ab +9w-3 Coefficient =-8 Constant Term= -3

LIKE TERMS Like terms have the same variables raised to the same powers. Ex. 4x 2 +8x 2 +9y 3 z+4yz-7y 3 z

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