 # Expressions Equations and Inequalities Ch 1 3 Algebraic

• Slides: 12 Expressions, Equations and Inequalities Ch. 1. 3 Algebraic Expressions EQ: How do you evaluate algebraic expressions? I Will. . . Evaluate algebraic expressions. . Bell Work Simplify the expressions 1. 3 X + 6 X - X + 4 Y 2. 2(X + Y) - 2 X 3. X(X + W) + XW - W EQ: How do you evaluate algebraic expressions? I Will. . . Evaluate algebraic expressions. . Algebraic Expressions READ 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. . 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. EQ: How do you evaluate algebraic expressions? I Will. . . Evaluate algebraic expressions. . Modeling a Situation You 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 Situation Now 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) + 3 b – 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. .