1.3 Algebraic Expressions_1.notebook
September 08, 2011
1.3 Algebraic Expressions
An algebraic expression is a mathematic phrase that contains one or more variables.
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1.3 Algebraic Expressions_1.notebook
September 08, 2011
To model a situation with an algebraic expression:
a. Define one or more variables to represent the unknown(s).
b. Use the variables to represent the situation.
2. You start with $20 and save $6 each week. What algebraic expression models the total amount you save?
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1.3 Algebraic Expressions_1.notebook
September 08, 2011
2.a You had $150, but you are spending $2 each day. What algebraic expression models this situation?
3. What is the value of the expression for the given values of the variables?
a. 7(a + 4) + 3b ­ 8 for a = ­4 and b = 5
4. In football a touchdown (TD) is worth 6 points, and extra­point kick (EPK) one point and a field goal (FG) three points. What algebraic expression models the total number of points that a football team scores in a game, assuming each scoring play is one of the three types?
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1.3 Algebraic Expressions_1.notebook
September 08, 2011
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1.3 Algebraic Expressions_1.notebook
September 08, 2011
HW p.22; 8,11­23odd,34
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1.3 Algebraic Expressions_1.notebook
September 08, 2011
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