Post on 18-Jan-2018
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Expressions, Equations and Inequalities
Ch. 1.3 Algebraic Expressions
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions. .
Bell WorkSimplify the expressions1. 3X + 6X - X + 4Y2. 2(X + Y) - 2X3. X(X + W) + XW - W
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions.
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Algebraic ExpressionsREAD
The difference between a numeric expression and an algebraic expression is that an algebraic expression contains one or more variables.
These variables model a changing or unknown number, and the expression may have different values depending on this quantity. Algebraic expressions can be mathematical models for the real-world situations.
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions. .
Modeling words with algebraic expressions
Write the algebraic expression that models the word phrase seven fewer than a number t.
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions. .
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions. .
Modeling words with algebraic expressions
Now you try…
1. Write the algebraic expression for the word phrase two times the sum of a and b.
2. Write the algebraic expression for the word phrase the quotient of the difference between 5 and a number n, and 2.
Modeling a SituationYou start with $20 and save $6 each week. Write an algebraic expression that models the total amount you save?
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions. .
Modeling a SituationNow you try…
You had $150, but you are spending $2 each day. What algebraic expression models that situation?
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions. .
Evaluating Algebraic Expressions
What is the value of the expression for the given values of the variables?
7(a+4) + 3b – 8 a=-4 and b= 5
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions. .
Evaluating Algebraic Expressions
Now you try…
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions. .
Simplifying Algebraic Expressions
Combine like terms. What is a simpler form of each expression?
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions. .
Simplifying Algebraic Expressions
Now you try…
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions. .
Closure(On your bell sheet)
Describe what an algebraic expression is? What are the parts of an algebraic
expression? How can algebraic expressions be used to represent real-
world situations?
EQ: How do you evaluate algebraic expressions? I Will... Evaluate algebraic expressions. .