Section 5-1

Algebra the branch of mathematics that involves expressions and equations with variables contains numbers, variables, and at least one operation a language of symbols can translate words into algebraic expressions and equations al_Khwarizmi – “father of algebra”

Define a Variable Choose a variable to represent an unknown quanity First step in translating words into an algebraic expression

Write as an algebraic expression: four years older than her sister

Write as an algebraic expression: four times as many tomatoes as last year

Write as an algebraic expression: seven dollars less than Tabitha earned

Write as an algebraic expression: a batch of cookies divided among eight people

Write as an algebraic expression: a bank balance of $50 that will be increased by $100 each month

Write as an algebraic expression: a $20 safety deposit and $3 an hour to rent a snorkel mask

Write as an algebraic expression: $5 for each student and $7.50 for each adult to attend a movie