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Do Now 9/13/10

Do Now 9/13/10. Take out HW from Wednesday. Text p. 10-11, #2-32 even Copy HW in your planner. Text p. 18-20, #4-36 even QUIZ sections 1.1 – 1.3 Wednesday Chapter 1 Test Friday

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Do Now 9/13/10

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  1. Do Now 9/13/10 • Take out HW from Wednesday. • Text p. 10-11, #2-32 even • Copy HW in your planner. • Text p. 18-20, #4-36 even • QUIZ sections 1.1 – 1.3 Wednesday • Chapter 1 Test Friday • In your journal answer the following question. Suppose “#” is a special operation that “a # b” means 4a – 2b. What is 3 # 2? What is 2 # 3? Is # a commutative operation?

  2. HomeworkText p. 10-11, #2-32 even 2). Substitute 3 for x. Then multiply 3 times 3; add 9 +1; square 10; multiply 2 times 100. The result is 200. 4). 4 6). 47 8). 1 1/2 10). 16 12). 40 14). 1 16). 0 18). 32

  3. HomeworkText p. 10-11, #2-32 even 20). 7 + 7 was added before dividing 14 by 7;(1+13) ÷ 7 +7 = 14 ÷ 7 + 7 = 2+ 7 = 9 22). 16 24). 11 26). 15 28). 3 1/22 30). ¼ 32). (9 + 39 + 22) ÷ (11 – 9 + 3)

  4. Objective • SWBAT translate verbal phrases into expressions.

  5. Section 1.3, Write Expressions EXPRESSION – a collection of numbers and or variables that can be linked by +, -, x, and ÷ 5 ÷ x 13 * 22 - 14 y² – 8 11 x 9

  6. Writing Expressions Sum, plus, total, more than, increased by 5 + n k + 12 Difference, less than, minus, decreased by 12 – p x – 12 Product, times, of, multiplied by 3 x 5 3d (n)(w) p ∙ k Quotient, divided by, divided into k/7 14 ÷ r

  7. 10 + x 2 Translate verbal phrases into expressions Expression Verbal Phrase a. 6n – 4 4less than the quantity6times a numbern 3(7 + y) b. 3 times the sum of 7 and a number y c. 22 – m2 The difference of 22 and the square of a number m d. The quotient when the quantity 10 plus a number xis divided by 2

  8. RATE – a fraction that compares two quantities of different measurement. Examples of rates: speed, distance, wages 45miles hour 5 meters second 8 dollars hour A UNIT RATE is a rate that has a denominator of 1.

  9. 110miles2 55miles 110miles = = 2hours2 1hour 2hours EXAMPLE 4 Finding a Unit Rate A car travels 110 miles in 2 hours. Find the unit rate.

  10. 30 + 0.25 m 3.75 0.25 $.25 per minute = = 15 1 Your basic monthly charge for cell phone service is $30, which includes 300 free minutes. You pay a fee for each extra minute you use. One month you paid $3.75 for 15 extra minutes. Find your total bill if you use 22 extra minutes. STEP1Calculate the unit rate. STEP2 Write a verbal model and then an expression. Let mbe the number of extra minutes. STEP3 Evaluate the expression when m=22. 30 + 0.25(22) = 35.5 Total Bill: $35.50

  11. NJASK7 Prep Homework • Text p. 18-20, #4-36 even

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