Section 1-5 Algebra: Variables and Expressions

Vocabulary Algebra: Is a language of symbols, including variables Variable: Is a symbol, usually a letter, used to represent a number Algebraic expression: Are combinations of variables, numbers, and at least one operation Evaluate: Find the value

Example Evaluate 35 + x, if x=6 Replace the variable by its value, which is x= 35+6 =41

Examples N + 3 if n = Evaluate if c = 8 a.C b.C – 3 8 – 3 5 c.15 – c 15 – 8 7

8w – 2v if w=5 and v= mn 6 if m=8 and n=

Y if y= Evaluate if a=4 and b= 3 d.9a – 6b – e. ab f. A