1. Warm-up Date 09/14/09 Sec 1-1 Variables and Expressions Complete each equation. 1) 1 week = ___ days 2) 1 foot = ___ inches 3) 1 nickel = ___ cents 4) 1 gallon = ___ quarts 5) 1 yard = ___ feet 7 12 5 4 3

3. ۴ To identify variables, numerical expression, and variable expressions. ۴ To write variable expressions for word phrases.

4. To use the language of algebra to model real-world problems.

5. Variable: Is a letter that stands for a number. Variable Expression: Is a mathematical phrase that uses variables, numerals, and operation symbols. Numerical Expression: Is a mathematical phrase that uses numerals and operation symbols.

6. Write an expression for each quantity. the number of days in 4 weeks 7 ∙ 4 the number of days in w weeks 7w number of pounds in 160 ounces number of pounds in z ounces

7. Identify each expression as a numerical expression or a variable expression. a) 8 ÷ x variable expression b) 100 × 6 numerical expression c) d + 43 – 9 variable expression

8. Translate the word phrases into variable expressions. Nine more than a number y y + 9 4 less then a number nn – 4 A number z times three z · 3, 3z, 3(z), or 3 * z A number a divided by 12 a ÷ 12 or a/12 5 times the quantity 4 plus a number c 5 · (4 + c) or 5(4 + c)

9. ۴ To identify variables, numerical expression, and variable expressions. ۴ To write variable expressions for word phrases.

10. Web Site: PhSchool.com Tutor Code: ade-0101 Lesson Quiz Code: ada-0101

11. ۴ Write today’s objectives. ۴ Write today’s assignment.

12. ۴ Wk 1-1 ۴ Reflective Journal