Course Announcement
MATH 100
Developmental Mathematics
Please make the following amendment to the:
Study Guide - Up-date as of June 2007:
page 45, line just above the Note
9a2 + 6ab ÷ 3a = 3a + 2b
should read
(9a2 + 6ab) ÷ 3a = 3a + 2b
Developmental Math, by Probert and Targa:
page 40, Chapter 2, Exercise Set 2.15
question # 32
'… how much of each ingredient is required to make 3 kg of
gunpowder? '
should read
' … how much more of each ingredient is required to make 3 kg of
gunpowder? '
page 236, Chapter 9, Exercise Set 9.9.1
question # 6
' x – 3y = –9 '
should read
' x – 3y = 9 '
page 239, Chapter 9, Exercise Set 9.9.2
#545638
July 3, 2007
question # 8
' 10 – 1 x = – y '
3
should read
' 10 – 1 x = y '
3
page 292, Chapter 10, End of Chapter Test
question # 7
' 5 > − 4x + 2 ≥ 12 '
should read
' 5 < − 4x + 2 ≤ 12 '
page 375, EXAMPLE 13-10 first line below ‘Answer:’ should read
x2 - y2 x
xy
x2 - 2xy + y2
2x2y2
Multiply by reciprocal
page 400, first line above Exercise Set 13.4 should read
1.
4y + 7x
y – 3x
Developmental Math, by Probert and Targa
Answers to the Exercises
page 485, Chapter 1, Exercise Set 1.4
# 3. Answer should be: −1
page 486, Chapter 2, Exercise Set 2.3
# 10. Answer should be: 2 9/11
page 490, Chapter 3, Exercise Set 3.5
# 4. Answer should be: 5000.0
#545638
July 3, 2007
page 491, Chapter 3, Exercise Set 3.6
# 1. Answer should be: 73.8308
page 492, Chapter 4, Exercise Set 4.4
# 1. Answer should be: 14000 W
page 495, Chapter 7, Exercise Set 7.2.2
# 2. Answer should be: – 3 y
# 4. Answer should be: – 12 K – 7 T
# 6. Answer should be: – 3 x + 7 y
page 495, Chapter 7, Exercise Set 7.3
# 9. Answer should be: 7 g / cm 3
page 495, Chapter 7, Exercise Set 7.4
# 5. Answer should be: a = 2
page 496, Chapter 7, End of Chapter Test
# 2d. Answer should be: m · (m + 1)
# 4c. Answer should be: 15 x 10 / 3
page 497, Chapter 8, Exercise Set 8.4
# 2. Answer should be: ∠BAC = ∠DEC, ∠ABC = ∠CDE, ∠ACB =
∠DCE
page 497, Chapter 8, Exercise Set 8.6.2
Answers are misnumbered:
# 3 should read # 2; # 4 should read # 3;
4.
# 5 should read #
page 497, Chapter 8, Exercise Set 8.7
# 1c. Answer should be: A = 48 m 2
# 1g. Answer should be A = l 2 , P = 4 l
# 3. Answer should be: 36.87%
#545638
July 3, 2007
page 498, Chapter 8, Exercise Set 8.8
# 3b. Answer should be: 384.75 m 2
page 500, Chapter 9, Exercise Set 9.1
# 3. Answer should be: (0, – 2) between Quadrants III and IV
page 506, Chapter 9, Exercise Set 9.5
# 28. Left-most labeled point should be: (-8, 2.5)
page 509, Chapter 9, Exercise Set 9.7
# 9. Answer should be: y = 3 x + 1
2
page 512, Chapter 9, End of Chapter Test
# 11. Answer should be: m = 4 and b = 6
page 513, Chapter 10, Exercise Set 10.1.1
# 30. Answer should be: x ≤ 25
page 514, Chapter 10, Exercise Set 10.1.1
# 57. Answer should be: $1333.33
page 518, Chapter 10, End of Chapter Test
⎧
# 7. Answer should be: ⎨x −
⎩
5
3⎫
≤x<− ⎬
2
4⎭
page 519, Chapter 11, Exercise Set 11.2
# 1d. Answer should be: composite
# 2b. Answer should be: 3 × 5 × 13
page 519, Chapter 11, Exercise Set 11.4
# 6. Answer should be: 2g( 1 – 2h )
page 519, Chapter 11, Exercise Set 11.5
# 4. Answer should be: – 6t 2 + 22t – 20
#545638
July 3, 2007
page 520, Chapter 11, End of Chapter Test
# 1a. Answer should be: Composite: 1, 2, 3, 4, 6, 8, 12, 24
page 521, Chapter 12, Exercise Set 12.2.2
# 16. Answer should be: x = 3 ± √ 14
page 522, Chapter 12, Exercise Set 12.2.3
# 24. Answer should be: x = 4 ± i √ 19
5
# 28. Answer should be: y = 1± √ 22
3
Developmental Math, by Probert and Targa
Students Solutions Manual
page 82, Exercise Set 12.2.3
# 24. last two lines of solution should read:
x = 8 ± √ (-1)· 4 · 19
10
x = 4 ± i √ 19
5
# 28. last three lines of solution should read:
3y2 - 2y - 7 = 0
y = -(-2) ± √ (-2)2 – 4 · 3· (-7)
2·3
y = 1 ± √ 22
3
#545638
July 3, 2007