Ch



Practice B

Solving Absolute-Value Equations

Solve each equation.

1. [pic]( 12 2. [pic]( [pic] 3. [pic]( 6 ( 4

4. 5 ([pic]( 14 5. 3[pic]( 24 6. [pic]( 10

7. [pic]( 2 8. 4[pic]( 12 9. [pic]( 3 ( 9

10. [pic]( 18 11. [pic]( 0 12. [pic]( 2 ( 2

13. How many solutions does the equation [pic]( 1 have? _____________________________

14. How many solutions does the equation [pic]( 0 have? _____________________________

15. How many solutions does the equation [pic]( (1 have? ______________________________

Leticia sets the thermostat in her apartment to 68 degrees. The actual temperature in her apartment can vary from this by as much as

3.5 degrees.

16. Write an absolute-value equation that you can

use to find the minimum and maximum temperature. ______________________________

17. Solve the equation to find the minimum and

maximum temperature. ______________________________

Practice C

1. w ( [pic] 2. vf ( at ( vi

3. f ( [pic] 4. a ( 12 ( 5b

5. x ( [pic] 6. h ( [pic]

7. r ( s(t ( 9) 8. n ( [pic]

9. a. a ( [pic] 10. a. t ( [pic]

b. 19 m/s2 b. 8 years

Review for Mastery

1. s ( [pic] 2. b ( 180 ( a – c

3. K ( [pic] 4. w ( [pic]

5. 12 in.

6. add –x to both sides

7. multiply both sides by 2

8. add 3r to both sides

9. a ( [pic] 10. z ( 3(y ( x)

11. m ( pn ( 3

Challenge

1. l ( 375 2. P ( 2000

3. t ( 5 years

4. r ( 0.032 or 3.2%

5. $351 6. 3 years

7. $2200 8. 0.03 or 3%

9. $247 10. 5 years

11. 0.027 or 2.7%

Problem Solving

1. r ( [pic] 2. 9.1 m/s

3. 8.5 m/s 4. 0.4 m/s

5. B 6. F

7. D 8. J

Reading Strategies

1. Possible answer: 3x ( 2y ( 9

2. The equation contains only one

variable, n.

3. Yes, because it has two or more variables.

4. Divide both sides by r.

5. t ( [pic]

6. a. h ( [pic]

b. 3 cm

LESSON 2-6

PRACTICE A

1. (3; 2; (2; 2

2. (7; 7; 4; 4; 4; 4; (11; 3

3. 6; (6; 6; (5; 7

4. {(8, 8} 5. {(14, 14}

6. {(9, 9} 7. {(17, 17}

8. {(11, 7} 9. {(1, 11}

10. {(5, 5} 11. {(7, 3}

12. {(11, 9}

13. [pic]

14. 22 miles per gallon; 26 miles per gallon

Practice B

1. {(12, 12}

2. [pic]

3. {(10, 10}

4. {(9, 9}

5. {(8, 8}

6. {(13, 7}

7. {(1, 3}

8. {2, 8}

9. {(14, 10}

10. {(3, 3}

11. {1}

12. {3}

13. two 14. one

15. none 16. [pic]

14. 64.5(; 71.5(

Practice C

1. [pic] 2. {0}

3. {(10.5, 10.5} 4. (

5. {(7, 7} 6. {(11}

7. [pic] 8. [pic]

9. {(6.6, 8.6} 10. {(8, 3}

11. [pic] 12. [pic]

13.  [pic] 0.005; 2.995 m; 3.005 m

14. [pic] 1.5; (6.5(C; (3.5(C

Review for Mastery

1. {(6, 10} 2. {(15, 1}

3. {0, 10} 4. {(3, 3}

5. {2} 6. (

7. ( 8. {(10}

Challenge

1. [pic]

2. yes; possible answer: [pic]

3. [pic]

4. [pic]

5. [pic]

6. [pic]

7. [pic]

8. [pic]

9. [pic]

10. [pic]

Problem Solving

1. [pic]; 69.98 cm; 70.02 cm

2. [pic] = 0.021; 52.979 m; 53.021 m

3. (1 and 11 4. 11.9 cm

5. B 6. G

7. C

Reading Strategies

1. one

2. two

3. none

4. one

5. none

6. two

LESSON 2–7

PRACTICE A

1. 20 2. 58 ft/s

3. $1.05/lb 4. 2.5 pages/min

5. y ( 4 6. x ( 18

7. m ( 2 8. t ( 75

9. b ( (4 10. x ( 1

11. 150 in. 12. 160 mi

Practice B

1. 15 2. $0.49/lb

3. 0.1 cars/min 4. 46.9 ft/s

5. y ( 5 6. x ( (0.4

7. m ( (96 8. t ( [pic]

9. b ( 20 10. x ( 3.5

11. 185 in. 12. 3.7 cm

-----------------------

LESSON

2-6

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download