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Warm Up

Warm Up. Brainstorm words that are associated with:. Variables and Expressions. Section 1.1. Objective. TSWBAT Convert word phrases into algebraic expressions and back. Write a rule that describes a pattern. Vocabulary. Quantity Variable Algebraic Expression Numerical Expression.

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Warm Up

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  1. Warm Up • Brainstorm words that are associated with:

  2. Variables and Expressions Section 1.1

  3. Objective • TSWBAT • Convert word phrases into algebraic expressions and back. • Write a rule that describes a pattern.

  4. Vocabulary • Quantity • Variable • Algebraic Expression • Numerical Expression

  5. Associated Words

  6. Example 1 Convert the following phrases in to algebraic expressions • 25 more then a number n • Answer: n + 25 • 74 less then a number n • Answer: n – 74

  7. Practice • 18 more then a number n • 7 minus a number n • The sum of a number n and 8 • 9 plus a number n

  8. Example 2 What is the algebraic expression for the verbal phrase: • 5 times a number n • Answer: 5n • The quotient of a number n and 7 • Answer: n/7

  9. Practice • 6 times a number n • The quotient of 18 and a number n • The product of a number n and 3 • 6 divided by a number n

  10. Example 3 What is the algebraic expression for the word phrase • 8 less then the product of a number x and 4. • Answer:4x – 8 • Twice the sum of a number x and 8. • Answer:2(x + 8) • The quotient of 5 and the sum of 12 and a number x. • Answer:

  11. Example 4 • Write a verbal phrase you can use to represent the algebraic expression. • X + 8.1 • 10x + 9 • 5x – 1

  12. Example 5 • The table shows how the cost of renting a scooter depends on how long the scooter is rented. What is a rule for the total cost? Give the rule in words and as an algebraic expression. • Answer: 7.5h + 10

  13. Assignment • Pg. 7 # 10-40 even, 47-48, 56-66

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