1	Algebra I
2	Definitions Variable – A variable is a letter or symbol that represents a number (unknown quantity). 8 + n = 12
3	Definitions A variable can use any letter of the alphabet. n + 5 x – 7 w - 25
4	Definitions Algebraic expression – a group of numbers, symbols, and variables that express an operation or a series of operations. m + 8 r – 3
5	Definitions Evaluate an algebraic expression – To find the value of an algebraic expression by substituting numbers for variables. m + 8 m = 2 2 + 8 = 10 r – 3 r = 5 5 – 3 = 2
6	Definitions Simplify – Combine like terms and complete all operations m = 2 m + 8 + m 2 m + 8 (2 x 2) + 8 4 + 8 = 12
7	Words That Lead to Addition Sum More than Increased Plus Altogether
8	Words That Lead to Subtraction Decreased Less Difference Minus How many more
9	Write Algebraic Expressions for These Word Phrases Ten more than a number A number decrease by 5 6 less than a number A number increased by 8 The sum of a number & 9 4 more than a number
10	Write Algebraic Expressions for These Word Phrases A number s plus 2 A number decrease by 1 31 less than a number A number b increased by 7 The sum of a number & 6 9 more than a number
11	Evaluate each algebraic expression when x = 10 x + 8 x + 49 x + x x - x x - 7 42 - x
12	Complete This Table
13	Complete This Table
14	Write an Algebraic Expression for These Situations Scott’s brother is 2 years younger than Scott The sum of two numbers is 12 The difference between two numbers is 5