Welcome to Algebra 9611 Writing Algebraic Expressions From

Welcome to Algebra 9/6/11 Writing Algebraic Expressions From Words Take a “ 2. 2 Substituting Numbers for Variables” from the back table n Study Example 1 and Example 2 (2 mins) n Answer 1 – 24 on a separate sheet (13 mins) n

Announcements n Today is Tuesday: ¡ ¡ n Homework 1. 2 – due Tomorrow Quiz 1. 2 – Thursday Grades

Agenda n n 7: 50 - Warm Up 8: 10 – Announcements 8: 15 – Check Warm Up 8: 20 – Writing Algebraic Expressions From Words ¡ ¡ Notes (2. 3) – 5 mins Intro – 5 min Guided Practice Mult Choice Game – 15 mins Begin Homework – 10 mins

Cheat Sheet! together add combined increased by added to total of subtract decreased by Left Remains less than, fewer than difference in all sum product of plus per more than area groups of times multiply volume minus, less loss out of Take away divide quotient average per split percent

You already know Numerical Expressions English Expression The sum of four and seven The product of three tenths and forty Numerical Expression

Algebraic Expressions English Expression The sum of a number and six The product of length and width Algebraic Expression

+ and - • • • English A number plus seven The sum of a number and 7 A number increased by seven 7 more than a number Add seven to a number A number minus twelve Subtract 12 from a number 12 less than a number A number decreased by 12 Twelve minus a number Subtract a number from 12 12 decreased by a number Algebraic Expression

• and ÷ • • • English Two times a number The product of two and a number Twice a number One half a number 50% of a number The product of a number and 0. 5 Ten divided by a number The quotient of ten and a number A number divided by ten The quotient of a number and ten Algebraic Expression

Exponents and Roots • English A number squared A number to the second power A number to the power of two • The square root of a number • • A number cubed A number to the third power A number to the power of three • The cube root of a number • • • Algebraic Expression

Check For Understanding • Each person on the team receives a piece of paper that they quickly make into 4 cards, labeled A, B, C, and D • I am going to reveal a series of multiple choice questions • When you have your answer, place it face down on the front, right-hand corner of your desk • When time is called you must hold up the card that you chose • Then, we will discuss the choices A C B D

Multi-Choice Cards Translate to an algebraic expression: A) 11 more than y B) C) D)

Multi-Choice Cards Translate to an algebraic expression: A) 5 less than n B) C) D)

Multi-Choice Cards Translate to an algebraic expression: A) a number b divided by 8 B) C) D)

Multi-Choice Cards Translate to an algebraic expression: the product of 3. 3 and a number x A) B) C) D)

Multi-Choice Cards Translate to an algebraic expression: A) A number x fewer than 7 B) C) D)

Multi-Choice Cards Translate to an algebraic expression: A) A number u cubed B) C) D)

Multi-Choice Cards Translate to an algebraic expression: A) One fourth of a number p B) C) D)

Multi-Choice Cards Translate to an algebraic expression: A) 6 groups of a number d B) C) D)

Multi-Choice Cards Translate to an algebraic expression: A) a number w tripled plus t quadrupled B) C) D)

Multi-Choice Cards Translate to an algebraic expression: A) the product of 2 times a and 5 times b B) C) D)

Multi-Choice Cards Write an algebraic equation to model the relationship: The cost of beverages in a vending machine is shown: A) B) C) c = Cost b = Beverage D)

Multi-Choice Cards Write an algebraic equation to model the relationship: Leonardo gets paid to mow his neighbor’s lawn. He begins with $50, and for every week that he mows the lawn, he earns $20. Write a rule as an algebraic equation to model the relationship. A) B) C) T = Total Money W = # of weeks mowed D)