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PICK-UP AUTOMATICITY FOLDERS AND SHEET A3 BEFORE HAVING A SEAT!!!! Section 1-1: Variables and Expressions PEARSON COMMON CORE ALGEBRA I I am learning to… Write algebraic expressions. Vocabulary Quantity- anything that can be measured or counted. Variable- symbol, usually a letter, that represents the value(s) of a variable quantity. Algebraic Expression-mathematical phrase that includes one or more variables. Numerical Expression- a mathematical phrase involving numbers and operation symbols, but no variables. Useful Table to help you Translate Algebraic Expressions Operation Key Words Subtraction Less, difference, minus Multiplication Per, times, product Division Quotient, ratio Addition sum, more Example 1: Writing Expressions with Addition and Subtraction The difference of m and 6 6 less than n 15 more than m Example 2: Writing Expressions with Multiplication and Division The product of 7 and a number n 9 times a number m The quotient of a number x and 7 Example 3: Writing Expressions with Two Operations 8 more than three times a number n The product of 7 and the sum of a number n and 8 7 less than the product of 8 and a number y Example 4: Using Words for an Expression K+6 5x + 8 9x - 8 Example 5: Writing a Rule to Describe a Pattern A state park charges an entrance fee plus $18 for each night of camping. The table shows this relationship. What algebraic expression describes the total cost of camping n nights? Nights 1 2 3 n Total Cost ($18 x 1) + $20 ($18 x 2) + $20 ($18 x 3) + $20 ? Homework Exit Slip: Write an algebraic expression for the following word phrase: 17 less than h Page 7 #’s 10-32 even