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

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