Do Now 9/13/10Do Now 9/13/10

Take out HW from Wednesday.Take out HW from Wednesday.• Text p. 10-11, #2-32 evenText p. 10-11, #2-32 even

Copy HW in your planner.Copy HW in your planner.• Text p. 18-20, #4-36 evenText p. 18-20, #4-36 even• QUIZ sections 1.1 – 1.3 WednesdayQUIZ sections 1.1 – 1.3 Wednesday• Chapter 1 Test FridayChapter 1 Test Friday

In your journal answer the following question. In your journal answer the following question. Suppose “#” is a special operation that “a # b” Suppose “#” is a special operation that “a # b” means 4a – 2b. What is 3 # 2? What is 2 # 3? Is means 4a – 2b. What is 3 # 2? What is 2 # 3? Is # a commutative operation? # a commutative operation?

HomeworkHomeworkText p. 10-11, #2-32 evenText p. 10-11, #2-32 even

2). Substitute 3 for x. Then multiply 3 2). Substitute 3 for x. Then multiply 3 times 3; add 9 +1; square 10; multiply 2 times 3; add 9 +1; square 10; multiply 2

times 100. The result is 200.times 100. The result is 200. 4). 44). 4 6). 476). 47 8). 1 1/28). 1 1/210). 1610). 1612). 4012). 4014). 114). 116). 016). 018). 32 18). 32

20). 7 + 7 was added before dividing 14 by 20). 7 + 7 was added before dividing 14 by 7;(1+13) 7;(1+13) ÷ 7 +7 = 14 ÷ 7 + 7 = 2+ 7 = 9÷ 7 +7 = 14 ÷ 7 + 7 = 2+ 7 = 9

22). 16 22). 16

24). 1124). 11

26). 1526). 15

28). 3 1/2228). 3 1/22

30). ¼30). ¼

32). (9 + 39 + 22) 32). (9 + 39 + 22) ÷ (11 – 9 + 3) ÷ (11 – 9 + 3)

HomeworkHomeworkText p. 10-11, #2-32 evenText p. 10-11, #2-32 even

ObjectiveObjective

SWBAT translate verbal phrases into SWBAT translate verbal phrases into expressions.expressions.

Section 1.3, Write ExpressionsSection 1.3, Write Expressions

EXPRESSIONEXPRESSION – – a collection of numbers and or a collection of numbers and or variables that can be linked by +, variables that can be linked by +, -, x, and -, x, and ÷÷

y² – 8 13 * 22 - 14

11 x 9

5 ÷ x

Writing ExpressionsWriting Expressions

OperationOperation Verbal PhraseVerbal Phrase ExpressionExpression

AdditionAddition

SubtractionSubtraction

MultiplicationMultiplication

DivisionDivision

7

y

Sum, plus, total, Sum, plus, total,

more than, more than,

increased byincreased by

5 + n k + 125 + n k + 12

Difference, less than, Difference, less than, minus, decreased byminus, decreased by

12 – p x – 1212 – p x – 12

Product, times, Product, times,

of, multiplied byof, multiplied by3 x 5 3d3 x 5 3d

(n)(w) p ∙ k(n)(w) p ∙ k

Quotient, divided by, Quotient, divided by, divided intodivided into

k/7 14 ÷ rk/7 14 ÷ r

Translate verbal phrases into expressionsTranslate verbal phrases into expressions

Verbal PhraseVerbal Phrase ExpressionExpression

a. a. 44 less than the quantityless than the quantity 66 times a numbertimes a number nn

b.b. 33 times the sum of times the sum of 77 and a number and a number yy

c.c. The difference of The difference of 2222 and the square of a and the square of a number number mm

66n n – 4– 4

3(7 + 3(7 + yy))

22 – 22 – mm22

The quotient when the quantity 10 plus a number x is divided by 2

d.d. 10 + x2

RATERATE – – a fraction that compares two a fraction that compares two quantities of different quantities of different measurement. measurement.

45miles45miles hourhour

5 meters5 meters secondsecond

8 dollars8 dollars hourhour

A UNIT RATEUNIT RATE is arate that has a denominator of 1.

Examples of rates: speed, distance, wagesExamples of rates: speed, distance, wages

EXAMPLE 4

Finding a Unit RateFinding a Unit Rate

A car travels 110 miles in 2 hours. Find the unit rate.

110 miles 2 hours = 1 hour

55 miles2 hours 2

110 miles 2 =

STEPSTEP 11 Calculate the unit rateCalculate the unit rate..

1515

3.753.75==

0.250.25

11 == $.25 $.25 per minuteper minute

Write a verbal model and then an expression. Let Write a verbal model and then an expression. Let mm be the number of be the number of extra minutesextra minutes..

STEPSTEP 22

30 + 0.25 30 + 0.25 mm

Evaluate the expression when Evaluate the expression when mm == 22.22.

30 + 0.25(22) = 35.530 + 0.25(22) = 35.5

STEPSTEP 33

Total Bill: $35.50Total Bill: $35.50

Your basic monthly charge for cell phone service is Your basic monthly charge for cell phone service is $30$30, which , which includes includes 300300 free minutes. You pay a fee for each extra minute you use. free minutes. You pay a fee for each extra minute you use. One month you paid One month you paid $3.75$3.75 for for 1515 extra minutes. Find your total bill if you extra minutes. Find your total bill if you use use 2222 extra minutes. extra minutes.

HomeworkHomework Text p. 18-20, #4-36 evenText p. 18-20, #4-36 even

NJASK7 PrepNJASK7 Prep