Answer Key 25. {w|5 < < 2} w 1. 6 26. (3, 5) 2. 3 27. (4, –1) 3. 9 28. {x|x < 3} 4. 29. a 5. = 0.10 + 28.75 y x 30. a 6. 5x + = 14 7y 31. substitution; (3, 2) 7. 32. 23 and –6 8. 33. 186 student tickets; 135 adult tickets 9. = 2 y x – 34. 10. 35. 14 dimes; 19 nickels 11. = y x 36. 12. yes; 3 37. 3x + 0.75y 20; No, the cost would be more than 13. + 19 an= $20.00. –7n 14. = 3x 10 38. y – 15. 6 16. (3, (–1, (3, 3) –1), –1), 17. = 2x + 1 y – 18. = 4 y x – 19. 20. 21. = 1.2t + 1.8; 6 years 22. one solution; (4, 0) 23. infinitely many solutions 24. {c|c 13}
Answer Key 1. 6 2. 3 3. 9 4. 5. y = 0.10 x + 28.75 6. 5x + 7y = 14 7. 8. 9. y = x – 2 10. 11. y = x 12. yes; 3 13. an= –7n + 19 14. y = 3x – 10 15. 6 16. (3, –1), (–1, –1), (3, 3) 17. y = – 2x + 1 18. y = x – 4 19. 20. 21. = 1.2t + 1.8; 6 years 22. one solution; (4, 0) 23. infinitely many solutions 24. {c|c 13} 25. {w|5 < w < 2} 26. (3, 5) 27. (4, –1) 28. {x|x < 3} 29. a 30. a 31. substitution; (3, 2) 32. 23 and –6 33. 186 student tickets; 135 adult tickets 34. 35. 14 dimes; 19 nickels 36. 37. 3x + 0.75y 20; No, the cost would be more than $20.00. 38.
DFA_ReviewALG-Quarter-2.docx