Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
INTERMEDIATE ALGEBRA, Chapter 2 Form A 109
CHAPTER 2, FORM A INTERMEDIATE ALGEBRA
NAME: ______________________________ SECTION: ________
For Exercises 1-4, solve each equation. 1. 2( 3) 4 8 4x x x x− − = − − 1. _____________________ 2. ( ) ( ) 27354327330 ++−=−−+− cccc 2. _____________________ 3. ( )0.7 14 0.5 32.2y y− − = 3. _____________________
4. 12
19
34
3 =+− xx 4. _____________________
5. Decide whether
( ) ( ) 32583410 −−=+− xx is a conditional equation, an identity, or a contradiction. Give its solution set. 5. _____________________
_____________________
6. Solve for d: 4 5
3
d cc
b
+=
− 6. _____________________
7. Solve for f: 4 5 7f h g− = + 7. _____________________ For Exercises 8-13, solve the problem. 8. During the 2010 MLB season, New York
Yankees third baseman Alex Rodriguez earned a yearly salary of $33,000,000. If there were 162 games in the regular season, how much did Alex Rodriquez earn per regular season game? (Round to the nearest dollar) 8. _____________________
9. Mark and Maren invested $6800 in a mutual
fund one year ago. During the year, their fund increased in value by $380.80. What interest rate did Mark and Maren earn? 9. _____________________
110 INTERMEDIATE ALGEBRA, Chapter 2 Form A
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
10. The sale price on a new jacket is $172. This represents 20% off the regular price. What is the regular price? 10. _____________________
11. Two trains leave at the same time from cities that are 450 miles apart, traveling toward each other on adjacent tracks. One train is traveling 20 miles per hour slower than the other. They pass each other after 3 hours. Find the speed of each train. 11. ____________________
12. Gary invested some money at 3% and $1200 more than that at 5%. His total annual
interest was $340. How much did Gary invest at each rate? 12. ____________________
13. Find the measure of each angle.
( )3 30x +
x x 13. ____________________ For Exercises 14-16, solve each inequality. Give the solution set in both interval and graph forms. 14. ( ) dd 242320 −≥+− 14. ____________________
15. 933
27 ≤−≤− x 15. ____________________
16. 287
4 −≥− y 16. ____________________
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
INTERMEDIATE ALGEBRA, Chapter 2 Form A 111
17. Sam has grades of 91, 93, and 81 on his first three science exams. If he wants an average of at least 84 after his fourth test, what are the possible scores he can earn on his fourth test? 17. ____________________
For Exercises 18-19, let { } { }2 , 4 , 6 , 8 and 1 , 2 , 4 , 9 , 13A B= = .
18. Find BA∪ . 18. ____________________ 19. Find BA∩ . 19. ____________________ For Exercises 20-23, solve the compound or absolute value inequality. Give the solution set in both interval and graph forms. 20. 1432or 1134 ≥−>+ xx 20. ____________________
21. 772 ≤−t 21. ____________________
22. 1013or 62 −<−−<− yy 22. ____________________
23. 243 >− x 23. ____________________
For Exercises 24-25, solve the absolute value equation. 24. 9243 −=+ xx 24. ____________________
25. 4 8 20 14x − − = − 25. ____________________
112 INTERMEDIATE ALGEBRA, Chapter 2 Form B
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
CHAPTER 2, FORM B INTERMEDIATE ALGEBRA
NAME: ______________________________ SECTION: ________
For Exercises 1-4, solve each equation. 1. 2 4( 1) 5(1 )x x x− − = − + 1. _____________________ 2. ( ) ( ) 736349 −−−=−−− zzz 2. _____________________ 3. ( )0.8 9 13.8 0.2y y− = − 3. _____________________
4. 12
43
3
2
4
7 −=+− xx 4. _____________________
5. Decide whether
( ) ( ) ( )1783647 −−−=+− xxx is a conditional equation, an identity, or a contradiction. Give its solution set. 5. _____________________
_____________________
6. Solve for b: 1
2A bh= 6. _____________________
7. Solve for g: 3 5 7g h f− = + 7. _____________________ For Exercises 7-12, solve the problem. 8. The 2008 Daytona 500 (mile) race was won by Ryan Newman with a time of 3.27 hours. What
was his average speed in miles per hour rounded to the nearest tenth? 8. _____________________
9. The sale price on a new natural gas furnace is $2750. This represents 12% off the regular price.
What is the regular price? 9. _____________________ 10. Steven Wilson invested $8700 in a certificate of
deposit one year ago. During the year, his fund increased in value by $217.50. What interest rate did Steve’s investment earn? 10. _____________________
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
INTERMEDIATE ALGEBRA, Chapter 2 Form B 113
11. Two distance runners leave from the same point at the same time, traveling in opposite directions. One runs 2 miles per hour faster than the other. After 2 hours, they are 36 miles apart. Find the speed of each runner. 11. ____________________
12. Ross and Karen invested some money at 3% and $1500 more than that at 5%. Their total annual
interest was $267. How much did they invest at each rate? 12. ____________________
13. Find the measure of each angle.
( )3 30x +
x ( )50x +
13. ____________________ For Exercises 14-16, solve the inequality. Give the solution set in both interval and graph forms. 14. ( ) tt −≥+− 2314 14. ____________________
15. 334
312 ≤−≤− x 15. ____________________
16. 147
2 ≥− x 16. ____________________
17. Andrew has test grades of 94, 91, and 80 on
his first three algebra tests. If he wants an average of at least 88 after his fourth test, what are the possible scores he can make on his fourth test? 17. ____________________
114 INTERMEDIATE ALGEBRA, Chapter 2 Form B
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
For Exercises 18-19, let { } { }1 , 2 , 4 ,9 and 2 , 4 , 9 , 13A B= = .
18. Find BA∪ . 18. ____________________ 19. Find BA∩ . 19. ____________________ For Exercises 20-23, solve each compound or absolute value inequality. Give the solution set in both interval and graph forms. 20. 823or 1134 −>−−<− xx 20. ____________________
21. 2 1 3 and 3 9x x− ≤ ≥ − 21. ____________________
22. 4 3 9t − > 22. ____________________
23. 1532 <+r 23. ____________________
For Exercises 24-25, solve each absolute value equation. 24. 5672 −=+ xx 24. ____________________
25. 4 3 2 3x − − = 25. ____________________
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
INTERMEDIATE ALGEBRA, Chapter 2 Form C 115
CHAPTER 2, FORM C INTERMEDIATE ALGEBRA
NAME: ______________________________ SECTION: ________
For Exercises 1-4, solve each equation. 1. 3 2(1 ) 5( 2) 8x x x− − = − − − 1. _____________________ 2. ( ) ( ) 2512349 +−−=+−− zzz 2. _____________________ 3. ( )52.4 0.6 9 0.4y y− + = 3. _____________________
4. 2
7
2
13
5
52 zzz −++=+ 4. _____________________
5. Decide whether
( ) ( ) ( ) ( )1712431564 ++−++−=+ xxxx is a conditional equation, an identity, or a contradiction. Give its solution set. 5. _____________________
_____________________ 6. Solve for b: 2ax bx c P+ + = 6. _____________________ 7. Solve for k: 2 3 6k h f− = − − 7. _____________________ For Exercises 8-13, solve each problem. 8. The 2004 Daytona 500 (mile) race was won by Dale Earnhardt Jr., who averaged 156.3 mph.
What was his time to the nearest thousandth of an hour? 8. _____________________
9. The sale price on a new living room set is $1687.50. This represents 25% off the regular price. What is the regular price? 9. _____________________ 10. Peter Piper invested $26,000 in a mutual
fund one year ago. During the year, his fund increased in value by $1690. What interest rate did Peter’s investment earn? 10. _____________________
116 INTERMEDIATE ALGEBRA, Chapter 2 Form C
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
11. Two airplanes leave Chicago’s Midway airport at the same time, traveling in opposite directions. One travels 25 miles per hour faster than the other. After 2 hours, they are 490 miles apart. Find the speed of each airplane. 11. ____________________
12. Mason invested some money at 5% and $1200 less than that at 3%. His total annual
interest was $252. How much did he invest at each rate? 12. ____________________
13. Find the measure of each angle.
( )3 10x −
( )4 50x −
x 13. ____________________ For Exercises 13-15, solve the inequality. Give the solution set in both interval and graph forms. 14. ( ) ( )7 3 2 6 1t t− − < − + 14. ____________________
15. 1555
25 ≤+≤− x 15. ____________________
16. 123
4 −<− x 16. ____________________
17. Janet has test grades of 82, 83, and 68 on
her first three algebra tests. If she wants an average of at least 80 after her fourth test, what are the possible scores she can make on the fourth test? 17. ____________________
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
INTERMEDIATE ALGEBRA, Chapter 2 Form C 117
For Exercises 18-19, let { } { }4 , 6 , 7 , 8 and 5 , 9 , 10 , 12A B= = .
18. Find BA∩ . 18. ____________________ 19. Find BA∪ . 19. ____________________ For Exercises 20-23, solve each compound or absolute value inequality. Give the solution set in both interval and graph forms. 20. 1152or 853 ≥+<+ x x 20. ____________________
21. 62 and 1943 <−<+ xx 21. ____________________
22. 9114 ≤−t 22. ____________________
23. 1753 >+x 23. ____________________
For Exercises 24-25, solve each absolute value equation. 24. 7952 +=− xx 24. ____________________
25. 6 4 8 12x − − = 25. ____________________
118 INTERMEDIATE ALGEBRA, Chapter 2 Form D
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
CHAPTER 2, FORM D INTERMEDIATE ALGEBRA
NAME: ______________________________ SECTION: ________
For Exercises 1-4, solve each equation. 1. 2 3 5 3(6 2)x x x+ − = + 1. _____________________ 2. ( ) ( ) 92572374 −−=+−− rr 2. _____________________ 3. ( )0.04 6 0.02 3.16g g+ − = 3. _____________________
4. 9
4
9
122
6
8 zzz −+=+ 4. _____________________
5. Decide whether
( ) ( ) ( )29953426 −=−−+− xxx is a conditional equation, an identity, or a contradiction. Give its solution set. 5. _____________________
_____________________
6. Solve for h: 24
3V r hπ= 6. _____________________
7. Solve for f: 2 3 9f h f− = − 7. _____________________ For Exercises 8-13, solve each problem. 8. Ward Burton won the Daytona 500-mile
race in 2002, in a time of 3.48 hours. What was his average speed in miles per hour, rounded to the nearest tenth? 8. _____________________
9. The sale price on a trip to Jamaica is $2117.50. This represents 30% off the regular price. What is the regular price? 9. _____________________
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
INTERMEDIATE ALGEBRA, Chapter 2 Form D 119
10. Dave and Lisa invested $18,500 in a mutual fund one year ago. During the year, their fund increased in value by $1110. What interest rate has their investment earned? 10. _____________________
11. Two cars leave at the same time from towns
that are 180 miles apart, traveling toward each other. One car travels 10 miles per hour faster than the other. They meet each other after two hours. Find the speed of each car. 11. ____________________
12. Karl and Katie invested some money at 4.5% and $1200 less than that at 3%. Their total annual interest was $189. How much did they invest at each rate? 12. ____________________ 13. Find the measure of each angle.
( )3 50x −
( )10x − ( )10x +
13. ____________________ For Exercises 14-16, solve each inequality. Give the solution set in both interval and graph forms. 14. ( ) tt 83212 −≤−− 14. ____________________
15. 467
28 ≤+≤− x 15. ____________________
16. 62
3 −>− x 16. ____________________
120 INTERMEDIATE ALGEBRA, Chapter 2 Form D
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
17. Daniel has test grades of 62, 64, and 78 on his first three algebra tests. If he wants an average of at least 75 after his fourth test, what are the possible scores he can earn on the fourth test? 17. ____________________
For Exercises 18-19, let { } { }7, 9, 10, 11,12 and 4, 10, 11, 12, 13= =A B .
18. Find BA∪ . 18. ____________________ 19. Find BA∩ . 19. ____________________ For Exercises 20-23, solve each compound or absolute value inequality. Give the solution set in both interval and graph forms. 20. 753or 1518 >−<− xx 20. ____________________
21. ( ) 613or 1013 ≥−≤+ xx 21. ____________________
22. 1293 ≤−t 22. ____________________
23. 3275 >+r 23. ____________________
For Exercises 24-25, solve each absolute value equation. 24. 675 −=− xx 24. ____________________
25. 3 4 14 8x − − = − 25. ____________________
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
INTERMEDIATE ALGEBRA, Chapter 2 Form E 121
CHAPTER 2, FORM E INTERMEDIATE ALGEBRA
NAME: ______________________________ SECTION: ________
For Exercises 1-4, solve each equation. 1. 4 2 5 7( 1)x x x− + = − 1. __________
(A) 5
2⎧ ⎫⎨ ⎬⎩ ⎭
(B) 5
2⎧ ⎫−⎨ ⎬⎩ ⎭
(C) 9
2⎧ ⎫⎨ ⎬⎩ ⎭
(D) 9
2⎧ ⎫−⎨ ⎬⎩ ⎭
2. ( ) ( ) 2512349 +−−=+−− zzz
(A) { }2− (B) { }3− (C) 7
2⎧ ⎫−⎨ ⎬⎩ ⎭
(D) 14
5⎧ ⎫−⎨ ⎬⎩ ⎭
2. __________
3. ( )52.4 0.6 9 0.4y y− + =
(A) { }235− (B) { }259.3− (C) {47} (D) {51.86} 3. __________
4. 2
7
2
13
5
52 zzz −++=+
(A) { }5− (B) {4} (C) 35
3⎧ ⎫−⎨ ⎬⎩ ⎭
(D) 15
8⎧ ⎫−⎨ ⎬⎩ ⎭
4. __________
5. Decide whether ( ) ( ) ( ) ( )1712431564 ++−++−=+ xxxx
is a conditional equation, an identity, or a contradiction. (A) Conditional (B) Identity (C) Contradiction 5. _________
6. Solve for h: ( )1 2
1
2A h b b= +
(A) ( )1 22 b b
hA
−= (B) 1 22h A b b= − −
(C) ( )1 2
2
A b bh
− += (D)
1 2
2Ah
b b=
+ 6. __________
122 INTERMEDIATE ALGEBRA, Chapter 2 Form E
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
7. Solve for f: 4 5 7f h f− = +
(A) 7 5
3
hf
+= (B) 7 1f h= +
(C) 7 5
3
hf
−= (D) 3
7 5f
h=
+ 7. __________
For Exercises 8-13, solve the problem. 8. Michael Waltrip won the Daytona 500-mile race in 2001, with a time of 3.08 hours. What was his average speed in miles per hour, rounded to the nearest tenth?
(A) 156.7 mph (B) 123.4 mph (C) 162.3 mph (D) 167.9 mph 8. __________
9. The sale price on a new laptop computer is $545.22.
This represents 22% off the regular price. What is the regular price?
(A) $600.78 (B) $699 (C) $731 (D) $705.78 9. __________
10. Tim and Mary invested $1700 in a mutual
fund one year ago. During the year, their fund increased in value by $55.25. What interest rate has their investment earned?
(A) 2.25% (B) 3.25% (C) 4.25% (D) 5.25% 10. _________
11. Two airplanes leave Chicago’s Midway airport at
the same time, traveling in opposite directions. One travels 25 miles per hour faster than the other. After 2 hours, they are 490 miles apart. Find the speed of the faster airplane. (A) 110 mph (B) 135 mph (C) 160 mph (D) 185 mph 11. _________
12. Bob and Elaine invested some money at 6% and $1250
less than that at 4%. Their total annual interest was $510. How much did she invest at 6%?
(A) $8100 (B) $4350 (C) $6850 (D) $5600 12. _________
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
INTERMEDIATE ALGEBRA, Chapter 2 Form E 123
13. Find the measure of each angle.
( )3 30x +
x x (A) 40 ,40 ,100 (B) 45 , 45 ,90
(C) 25 , 25 ,130 (D) 30 ,30 ,120 13. ________ For Exercises 14-15, solve the inequality. Give the solution set in interval form.
14. 123
4 −<− x
(A) ( )∞,16 (B) ( )16,∞− (C) ( )∞,9 (D) ( )9,∞− 14. ________ 15. ( ) ( )16237 +−≤−− tt
(A) ⎥⎦⎤
⎜⎝⎛ −∞−
3
14, (B) ( ]4, −∞−
(C) ( ]0,∞− (D) [ )∞,0 15. ________ For Exercise 16, solve the inequality. Give the solution set in graph form.
16. 1555
25 ≤+≤− x 16. ________
(A) (B)
(C) (D)
17. Reggie has test grades of 90, 92, and 93 on his first three
algebra tests. If he wants an average of at least 90 after his fourth test, what are the possible scores he can earn on his fourth test? (A) at least 85 (B) at least 81 (C) at least 83 (D) at least 79 17. ________
124 INTERMEDIATE ALGEBRA, Chapter 2 Form E
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
For Exercises 18-19, Let { } { }4 , 6 , 7 , 9 and 5 , 8 , 10 , 12A B= = .
18. Find BA∩ .
(A) { }4, 5, 8, 10, 12 (B) { }6, 8
(C) { }4, 5, 6, 7, 8, 9, 10, 12 (D) ∅ 18. ________
19. Find BA∪ .
(A) { }4, 5, 8, 10, 12 (B) { }8,6
(C) { }4, 5, 6, 7, 8, 9, 10, 12 (D) ∅ 19. ________
For Exercises 20-21, solve each compound or absolute value inequality. Give the solution set in interval form. 20. 1152or 853 ≥+<+ x x
(A) [ )3,1 (B) ( ] ( )∞∪∞− ,31,
(C) ( ) [ )∞∪∞− ,31, (D) ( ]3,1 20. ________ 21. 9114 ≤−t
(A) ⎥⎦⎤
⎢⎣⎡
5,2
1 (B) ( ]5,∞−
(C) ⎥⎦⎤
⎜⎝⎛ −∞−
2
1, (D) [ ]5,5− 21. ________
For Exercises 22-23, solve each compound or absolute value inequality. Give the solution set in graph form. 22. 62 and 1943 <−<+ xx 22. ________
(A) (B)
(C) (D)
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
INTERMEDIATE ALGEBRA, Chapter 2 Form E 125
23. 1753 >+x 23. ________
(A) (B)
(C) (D)
For Exercises 24-25, solve each absolute value equation. 24. 7952 +=− xx
(A) 12 12
,7 11
⎧ ⎫−⎨ ⎬⎩ ⎭
(B) 12 2
,7 11
⎧ ⎫− −⎨ ⎬⎩ ⎭
(C) 2 12
,7 11
⎧ ⎫−⎨ ⎬⎩ ⎭
(D) ∅ 24. ________
25. 6 3 1 5x + − =
(A) 1
2⎧ ⎫⎨ ⎬⎩ ⎭
(B) 3
2⎧ ⎫−⎨ ⎬⎩ ⎭
(C) 3 1
,2 2
⎧ ⎫−⎨ ⎬⎩ ⎭
(D) ∅ 25. ________
126 INTERMEDIATE ALGEBRA, Chapter 2 Form F
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
CHAPTER 2, FORM F INTERMEDIATE ALGEBRA
NAME: ______________________________ SECTION: ________
For Exercises 1-4, solve each equation. 1. 2 1 7 3( 8)x x x+ − = − 1. __________
(A) 25
8⎧ ⎫⎨ ⎬⎩ ⎭
(B) { }5 (C) 25
2⎧ ⎫⎨ ⎬⎩ ⎭
(D) { }6−
2. ( ) ( ) 92572374 −−=+−− rr
(A) { }1− (B) { }17− (C) 35
11⎧ ⎫⎨ ⎬⎩ ⎭
(D) 9
19⎧ ⎫⎨ ⎬⎩ ⎭
2.__________
3. ( )0.04 6 0.02 3.16g g+ − =
(A) {3.8} (B) {12.8} (C) {146} (D) {155} 3.__________
4. 9
4
9
122
6
8 zzz −+=+
(A) {1} (B) {0} (C) 4
3⎧ ⎫⎨ ⎬⎩ ⎭
(D) 48
17⎧ ⎫−⎨ ⎬⎩ ⎭
4.__________
5. Decide whether the equation ( ) ( ) ( )29953426 −=−−+− xxx
is a conditional equation, an identity, or a contradiction.
(A) Conditional (B) Identity (C) Contradiction 5._________ 6. Solve for r: 2C rπ=
(A) 2Cr
π= (B)
2
Cr
π=
(C) 2r C π= − (D) 2
Cr
π−= 6._________
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
INTERMEDIATE ALGEBRA, Chapter 2 Form F 127
7. Solve for k: 3 3 6k h k− = − −
(A) 3 6
4
hk
+= (B) 3 6
4
hk
−=
(C) 4
3 6k
h=
− (D)
4
3 6k
h=
− 7. __________
For Exercises 8-13, solve the problem. 8. Kevin Harvick won the Daytona 500-mile
race in 2007, with a time of 3.37 hours. What was his average speed in miles per hour, rounded to the nearest tenth? (A) 156.7 mph (B) 145.9 mph (C) 139.6 mph (D) 148.4 mph 8. __________
9. The sale price on a big screen TV is $1612.50. This represents 25% off the regular price. What is the regular price?
(A) $2150 (B) $2015.63 (C) $2000.50 (D) $1948.18 9. __________
10. Perry and Ann invested $18,100 in a mutual
fund one year ago. During the year, their fund increased in value by $814.50. What interest rate has their investment earned?
(A) 3.5% (B) 3.8% (C) 4.5% (D) 4.8% 10. _________
11. Two cars leave at the same time from towns
that are 180 miles apart, traveling toward each other. One car travels 10 miles per hour faster than the other. They meet each other after two hours. Find the speed of the faster car. (A) 40 mph (B) 50 mph (C) 60 mph (D) 75 mph 11. _________
128 INTERMEDIATE ALGEBRA, Chapter 2 Form F
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
12. Richard and Bonnie invested some money at 6% and $1100 less than that at 4%. Their total annual
interest was $556. How much did they invest at 4%?
(A) $7100.00 (B) $6000.00 (C) $3800.00 (D) $4900.00 12. _________
13. Find the measure of each angle.
( )3 10x −
( )4 50x −
(A) 30 ,70 ,80 (B) 25 ,65 ,90
(C) 30 ,50 ,100 (D) 40 ,50 ,90 13. ________ For Exercises 14-16, solve each inequality. Give the solution set in interval form.
14. 62
3 −>− x
(A) ( )9,∞− (B) ( )∞,9 (C) ( )4,∞− (D) ( )∞,4 14. ________ 15. ( ) tt 83212 −≤−− (A) ( ]3, −∞− (B) [ )∞− ,3
(C) ⎥⎦⎤
⎜⎝⎛ ∞−
3
5, (D) ( ]15,∞− 15. ________
For Exercise 16, solve the inequality. Give the solution set in graph form.
16. 465
22 ≤+≤− x 16. ________
(A) (B)
(C) (D)
x°
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
INTERMEDIATE ALGEBRA, Chapter 2 Form F 129
17. Phillip has test grades of 79, 72, and 73 on his first three algebra tests. If he wants an average of at least 73 after his fourth test, what are the possible scores he can make on his fourth test? (A) at least 70 (B) at least 68 (C) at least 66 (D) at least 73 17. ________
For Exercises 18-19, Let { } { }7 , 9 , 11, 13 and 6 , 11 , 12 , 13A B= = .
18. Find BA∩ .
(A){ }12,9,7,6 (B) { }13,11
(C) { }13,12,11,9,7,6 (D) ∅ 18. ________ 19. Find BA∪ .
(A){ }12,9,7,6 (B) { }13,11
(C) { }13,12,11,9,7,6 (D) ∅ 19. ________ For Exercises 20-21, solve each compound or absolute value inequality. Give the solution set in interval form. 20. 8 1 15 or 3 5 7x x− < − >
(A) [ ]4,2 (B) ( ] [ )∞∪∞− ,42,
(C) ( )4,2 (D) ( ) ( )∞∪∞− ,42, 20. ________
21. 1293 ≤−t
(A) [ ]7,1− (B) ( ] [ )∞∪−∞− ,71,
(C) ( )7,1− (D) ( ) ( )∞∪−∞− ,71, 21. ________
130 INTERMEDIATE ALGEBRA, Chapter 2 Form F
Copyright © 2012 Pearson Education, Inc. Publishing as Addison-Wesley.
For Exercises 22-23, solve the compound or absolute value inequality. Give the solution set in graph form. 22. ( ) 613or 813 ≥−−≤+ xx 22. ________ (A) (B)
(C) (D) ∅
23. 3275 >+r 23. ________
(A) (B)
(C) (D) ∅
For Exercises 24-25, solve each absolute value equation. 24. 675 −=− xx
(A) 1
6⎧ ⎫⎨ ⎬⎩ ⎭
(B) 1 11
,6 8
⎧ ⎫⎨ ⎬⎩ ⎭
(C) 11 1
,8 6
⎧ ⎫− −⎨ ⎬⎩ ⎭
(D) 1
6⎧ ⎫−⎨ ⎬⎩ ⎭
24. ________
25. 8 2 6 12x − − =
(A) 5
2⎧ ⎫⎨ ⎬⎩ ⎭
(B) 5
2,2
⎧ ⎫−⎨ ⎬⎩ ⎭
(C) { }2− (D) ∅ 25. ________