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1.2 Algebraic Expressions and Models

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Sarah Stillwell

The document discusses evaluating algebraic expressions and combining like terms. It provides examples of evaluating expressions when given variable values. It then asks to write an expression for the total cost of purchasing apples and oranges for 20 friends, where apples cost 30 cents each and oranges cost 20 cents each. The total cost expression is given as 0.10n + 4, where n is the number of apples purchased.

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Objective - To evaluate algebraic expressions and combine like terms. Exponent Base Evaluate
Order of Operations Parenthesis Exponents Multiply / Divide Add / Subtract
Evaluate the following if a = 2, b = -3, c = 4, and d = -5 1) 2) 3)
Simplify the expressions. 1) 2)
You want to purchase apples and oranges for 20 friends. Apples cost 30 cents and oranges cost 20 cents. Write an expression for the total amount that you would spend. Apple price = .30 # of apples = n Orange price = .20 # of oranges = 20 - n Total = .30 n + .20(20 - n ) Total = .30 n + 4 - .20 n Total = .10 n + 4

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1.2 Algebraic Expressions and Models

  • 1. Objective - To evaluate algebraic expressions and combine like terms. Exponent Base Evaluate
  • 2. Order of Operations Parenthesis Exponents Multiply / Divide Add / Subtract
  • 3. Evaluate the following if a = 2, b = -3, c = 4, and d = -5 1) 2) 3)
  • 5. You want to purchase apples and oranges for 20 friends. Apples cost 30 cents and oranges cost 20 cents. Write an expression for the total amount that you would spend. Apple price = .30 # of apples = n Orange price = .20 # of oranges = 20 - n Total = .30 n + .20(20 - n ) Total = .30 n + 4 - .20 n Total = .10 n + 4