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New Elementary Math 2 This page last updated June 6, 2006
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| Chapter 2, Exercise 2.5 |
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| 3.(h) |
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| Chapter 3, Exercise 3.3 |
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Students will not receive the necessary information to solve problems 5, 13, and 15 until after completion of Section 3.5 |
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| Chapter 4, Class Activity 1 | ||||
| 8. | Question should read "If A increases by 10%,
its value becomes B. Then B is 110% of A." or "If A decreases by 10%, its value becomes B. Then B is 90% of A." |
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| Chapter 4, Exercise 4.1 |
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| 13. (a) |
1.5 x 108 km |
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| Miscellaneous Exercise 1 |
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| 3.(b) | 4 | |||
| 5. |
This problem requires knowledge of the quadratic formula, which students haven't learned yet. |
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| 14.(b) |
9.6% |
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| Chapter 5, Exercise 5.1 |
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| 4. (c) |
Should read: Join JK, KM, ML, and LJ |
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| Chapter 5, Exercise 5.4 |
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| 8. |
Line on the graph is incorrect, should end at 14:42. |
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| 9.(d)(i) |
Between 50 s and 80 s, the distance between the cars increases from 200 km to 400 km. |
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| 9.(e) |
A regains the lead at 110 sec. |
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| 9.(f) |
Speed = 166.5 km/h |
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| 10. |
The man passes the old man again at 14:38. |
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| Chapter 8, Exercise 8.2 |
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| 7.(b)(ii) |
The triangles cannot be proven to be similar from what is given in the problem. |
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| Revision 2A |
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| 7. |
This problem is inappropriate for this level and has multiple answers. The smallest answer possible for the number of bad oranges is 34. |
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| Chapter 9, Exercise 9.1 |
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| 4.(a) |
(i) 47 cm |
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| Chapter 9, Exercise 9.2 | ||||
| 10. | Not enough information given. Add MN = PQ | |||
| Chapter 11, Exercise 11.5 |
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| 1. (d) |
This figure is mislabeled; B' should be C' and C' should be B' if the first translation is a reflection in the y-axis, as in the answer. Otherwise the first translation is a rotation of 90° about the point (0, 2.5). The second translation is an enlargement by a factor of 0.5 with center at O. |
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| Revision 3A |
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| 8.(b) |
(ii) 63 cm2 |
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| Revision 4C |
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| 10.(b)(ii) |
x = 3 or -5/42 |
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| Miscellaneous Exercise 4 |
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| 10. |
y = (a - b)2/(a2 + b2) |
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| Assessment 1, Paper 1 |
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| 3. | x <= 83/28 (less than or equal to) | |||
| 14. | 3:36 p.m. or 15:36 | |||
| 16. |
net loss of $12.50 |
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