Answer Key. Lesson 3.1. Practice Level B. 1. C; consistent and independent. 2. A;
consistent and dependent 3. B; inconsistent. 4. 5. (4, 0). (23, 1). 6. 7. (2, 21).
Answer Key Lesson 3.1 Practice Level B 1. C; consistent and independent 2. A; consistent and dependent 3. B; inconsistent 4.
5.
(4, 0) 6.
(23, 1) 7.
(2, 21) 8.
(0, 3) 9.
(21, 22) 10.
(3, 4) 11.
(2, 21) 12.
(23, 22) (21, 4)
13. infinitely many solutions; consistent and dependent 14. (2, 6); consistent and independent 15. (1, 4); consistent and independent 16. 60 tickets at $36; 140 tickets at $28 17. R 5 5500t 18. C 5 3200t 1 115,000
Answer Key 19.
20. 50
Answer Key Lesson 3.2 Practice Level B
1
9 1 1. (2, 2) 2. (3, 0) 3. (2, 21) 4. }, } 4 2
1
2 5. }, 22 3
2
2
6. (21, 5) 7. (2, 3) 8. (21, 4)
1
1 9. (216, 25) 10. }, 2 2
2
1
4 17 11. 2}, } 5 10
2
12. (0, 22) 13. (1, 21) 14. (22, 1) 15. no solution 13 1 2 16. 2}, 27 17. (16, 6) 18. }, 2} 7 2 7
1
2
1
19. infinitely many solutions 21. (6, 212)
1
2
18 23 20. }, 2} 13 13
2
22. 1992
23. 60 of type A, 24 of type B 24. you: 8 h, your sister: 6 h
Answer Key Lesson 3.3 Practice Level B 1. B 2. C 3. A 4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19. y ≥ ⏐x 2 1⏐ 1 1
20. t ≤ 3
y
