1.2 Algebraic Expressions and Models, p. 11 Exponent 53 = 5 ∙ 5 ∙ 5 Base Evaluate: 1. (− 7)4 = (−7)(− 7)(− 7)(− 7) = 2401 2. − 74 = −(7 ∙ 7 ∙ 7 ∙ 7) = −2401

Order of Operations Parenthesis Exponents Multiply / Divide Add / Subtract

Order of Operations Parenthesis Please Exponents Excuse My Dear Multiply / Divide My Dear Add / Subtract Aunt Sally PEMDAS

Evaluate the following if a = 2, b = −3, c = 4, and d = −5 1) 2) 3)

Simplify the expressions. 1) 2)

Total = 0.30n + 0.20(20 − n) Total = 0.30n + 4 − 0.20n 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 = 0.30 Orange price = 0.20 # of apples = n # of oranges = 20 − n Total = 0.30n + 0.20(20 − n) Total = 0.30n + 4 − 0.20n Total = 0.10n + 4 p