Do Now 9/14/10Do Now 9/14/10 Take out HW from last night.Take out HW from last night.

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

Copy HW in your planner.Copy HW in your planner.• Text p. 20, #1-10 allText p. 20, #1-10 all• Text p. 24-26, #2-42 evenText p. 24-26, #2-42 even• Mid-Chapter 1 QUIZ WednesdayMid-Chapter 1 QUIZ Wednesday• Chapter 1 TEST FridayChapter 1 TEST Friday

In your journal, answer the following question. In your journal, answer the following question.

Pretend that you are teaching a 3Pretend that you are teaching a 3rdrd grade class and grade class and had to explain the definition of an equation. How would had to explain the definition of an equation. How would you explain it and what kind of visual object or model you explain it and what kind of visual object or model would you use?would you use?

HomeworkHomeworkText p. 18-20, #4-36 evenText p. 18-20, #4-36 even

4). 6y4). 6y

6). 50/h6). 50/h

8). 15 + x8). 15 + x

10). p10). p² - 3² - 3

12). 3w + 512). 3w + 5

14). C 14). C

16). 5 – p 16). 5 – p

18). 20 + j18). 20 + j

20). m/60 20). m/60 22). 8 students per group22). 8 students per group24). 2.4 runs per inning24). 2.4 runs per inning26). Feet should cancel out and not be squared; 26). Feet should cancel out and not be squared;

$48$4828). 1 3/16 mi. in 1 min 55 sec is greater28). 1 3/16 mi. in 1 min 55 sec is greater30). 30).

32). 98g; 1960 tons32). 98g; 1960 tons34). You earn $30 for shoveling driveways. If you 34). You earn $30 for shoveling driveways. If you

shoveled for 4 hours than you earn $7.50 per shoveled for 4 hours than you earn $7.50 per hour. hour.

36). 36s + 60l; 36(12) + 60(5) = 432 + 300 = 36). 36s + 60l; 36(12) + 60(5) = 432 + 300 = 732 sec732 sec

HomeworkHomeworkText p. 18-20, #4-36 evenText p. 18-20, #4-36 even

1275;2

)1( nn

Mid-Chapter 1 ReviewMid-Chapter 1 Review

Section 1.1- Evaluate ExpressionsSection 1.1- Evaluate Expressions

x

x 123 when x is equal to 5.when x is equal to 5.

5

3x

Section 1.2- Order of OperationsSection 1.2- Order of Operations

Section 1.3- Write ExpressionsSection 1.3- Write Expressions The sum of twice a number d and seven.The sum of twice a number d and seven. 72 d

Evaluate the expression.Evaluate the expression.2)]32(13[

4

3 48

ObjectiveObjective

SWBAT translate verbal sentences SWBAT translate verbal sentences into equations and inequalities.into equations and inequalities.

Section 1.4, “Write Equations Section 1.4, “Write Equations and Inequalities”and Inequalities”

EQUATION –EQUATION – mathematical sentence formed mathematical sentence formed by placing an “=“ between two by placing an “=“ between two expressionsexpressions

yy²² – 8 = 12 – 8 = 12

13 * 22 = 14 - z

13 * 22 = 14 - z

11 x a = 12111 x a = 121

5 ÷ x = 30

5 ÷ x = 30

INEQUALITYINEQUALITY – –

mathematical sentence formed by mathematical sentence formed by placing a <, ≤, >, or ≥ between two placing a <, ≤, >, or ≥ between two expressions. expressions.

yy²² – 8 < 12 – 8 < 12

13 * 22 13 * 22 ≥≥ 14 - z14 - z

11 - a 11 - a ≤≤ 121121

5 ÷ x > 30

5 ÷ x > 30

Writing Equations and InequalitiesWriting Equations and Inequalities

Symbol Meaning Key phrases

= Is equal to The same as

< Is less than Fewer than

≤ Is less than or equal to At most, no more than

> Is great than More than

≥ Is greater than or equal to

At least, no less than

Translate verbal phrases Translate verbal phrases into equations or inequalitiesinto equations or inequalities

Verbal PhraseVerbal PhraseEquation/Equation/InequalityInequality

a. a. the difference of twice a number k and 8 is 12.the difference of twice a number k and 8 is 12.

b.b. the product of 6 and a number n is at least 24.the product of 6 and a number n is at least 24.

c.c. a number y is no less than 5 and no more than 13.a number y is no less than 5 and no more than 13.

2k – 8 = 122k – 8 = 12

6n 6n ≥ 24≥ 24

5 5 ≤≤ y ≤ 13 y ≤ 13

SOLUTIONSOLUTION– – when you substitute for a variable the when you substitute for a variable the solution can be either TRUE or FALSE.solution can be either TRUE or FALSE.

2k – 8 = 122k – 8 = 12

6n 6n ≥ 24≥ 24

11 11 ≤≤ y ≤ 13 y ≤ 13

Substitute 10 for each variable. Substitute 10 for each variable. Is 10 the solution for each equation/inequality?Is 10 the solution for each equation/inequality?

SOLUTIONSOLUTION

SOLUTIONSOLUTION

NOT ANOT ASOLUTIONSOLUTION

2(10) – 8 = 122(10) – 8 = 12

6(10) 6(10) ≥ 24≥ 24

11 11 ≤≤ (10) ≤ 13 (10) ≤ 13

HomeworkHomework

• Text p. 20, #1-10 allText p. 20, #1-10 all• Text p. 24-26, #2-42 evenText p. 24-26, #2-42 even• Mid-Chapter 1 QUIZ tomorrowMid-Chapter 1 QUIZ tomorrow

Guided PracticeGuided Practice• Text p. 22, #2-7 allText p. 22, #2-7 all