Chapter 1

Chapter 1

Try It

1.1

ⓐ yes ⓑ yes ⓒ no ⓓ yes
ⓔ no

1.2

ⓐ no ⓑ yes ⓒ yes ⓓ no
ⓔ no

1.3

2 · 2 · 2 · 2 · 5 2 · 2 · 2 · 2 · 5

1.4

2 · 2 · 3 · 5 2 · 2 · 3 · 5

1.5

36 36

1.6

72 72

1.7

16

1.8

23

1.9

86

1.10

1

1.11

ⓐ 9 ⓑ 64 ⓒ 40

1.12

ⓐ 216 ⓑ 64 ⓒ 185

1.13

10 x 2 + 16 x + 17 10 x 2 + 16 x + 17

1.14

12 y 2 + 9 y + 7 12 y 2 + 9 y + 7

1.15

ⓐ 14x2−1314x2−13 ⓑ 12x÷212x÷2
ⓒ z+13z+13 ⓓ 8x−188x−18

1.16

ⓐ 17y2+1917y2+19 ⓑ 7y7y
ⓒ x+11x+11 ⓓ 11a−1411a−14

1.17

ⓐ 4(p+q)4(p+q) ⓑ 4p+q4p+q

1.18

ⓐ 2x−82x−8 ⓑ 2(x−8)2(x−8)

1.19

w − 7 w − 7

1.20

l − 6 l − 6

1.21

4 q − 8 4 q − 8

1.22

7 n + 3 7 n + 3

1.23

ⓐ == ⓑ >> ⓒ <<
ⓓ ==

1.24

ⓐ >> ⓑ == ⓒ >>
ⓓ <<

1.25

16

1.26

9

1.27

ⓐ −6−6 ⓑ 2 ⓒ −2−2

1.28

ⓐ −7−7 ⓑ 3 ⓒ −3−3

1.29

ⓐ 2 ⓑ −2−2 ⓒ −10−10 ⓓ 10

1.30

ⓐ 3 ⓑ −3−3 ⓒ −11−11 ⓓ 11

1.31

ⓐ 8,88,8 ⓑ −18,−18, −18−18
ⓒ 19,1919,19 ⓓ −4,−4, −4−4

1.32

ⓐ 8,88,8 ⓑ −22,−22, −22−22
ⓒ 23,2323,23 ⓓ 3,33,3

1.33

3

1.34

13

1.35

ⓐ 23 ⓑ 60 ⓒ −63−63 ⓓ −9−9

1.36

ⓐ 39 ⓑ 39 ⓒ −28 ⓓ −7

1.37

ⓐ 81 ⓑ −81−81

1.38

ⓐ 49 ⓑ −49−49

1.39

ⓐ 4 ⓑ 21

1.40

ⓐ 9 ⓑ 6

1.41

31

1.42

67

1.43

( 9 + ( −16 ) ) + 4 ; − 3 ( 9 + ( −16 ) ) + 4 ; − 3

1.44

( −8 + ( −12 ) ) + 7 ; − 13 ( −8 + ( −12 ) ) + 7 ; − 13

1.45

The difference in temperatures was 45 degrees.

1.46

The difference in temperatures was 9 degrees.

1.47

− 23 40 − 23 40

1.48

− 5 8 − 5 8

1.49

−33 a −33 a

1.50

−26 b −26 b

1.51

4 15 4 15

1.52

2 3 2 3

1.53

3 4 b 3 4 b

1.54

4 q 4 q

1.55

79 60 79 60

1.56

103 60 103 60

1.57

ⓐ 27a−323627a−3236 ⓑ 2a32a3

1.58

ⓐ 24k−53024k−530 ⓑ 2k152k15

1.59

4

1.60

2

1.61

1 90 1 90

1.62

272

1.63

2

1.64

2 7 2 7

1.65

− 1 2 − 1 2

1.66

2 3 2 3

1.67

ⓐ 6.586.58 ⓑ 6.66.6 ⓒ 7

1.68

ⓐ 15.21815.218 ⓑ 15.2215.22
ⓒ 15.215.2

1.69

ⓐ −16.49−16.49 ⓑ −0.42−0.42

1.70

ⓐ −23.593−23.593 ⓑ −12.58−12.58

1.71

−27.4815 −27.4815

1.72

−87.6148 −87.6148

1.73

ⓐ 25.8 ⓑ 258 ⓒ 2,580

1.74

ⓐ 142 ⓑ 1,420 ⓒ 14,200

1.75

587.3 587.3

1.76

34.25 34.25

1.77

ⓐ 117500117500 ⓑ −0.875−0.875

1.78

ⓐ 31253125 ⓑ −0.375−0.375

1.79

ⓐ 0.09, 0.87, 0.039 ⓑ 17%, 175%, 8.25%

1.80

ⓐ 0.03, 0.91, 0.083 ⓑ 41%, 225%, 9.25%

1.81

ⓐ 6 ⓑ 13 ⓒ −15−15

1.82

ⓐ 4 ⓑ 14 ⓒ −10−10

1.83

ⓐ 4,494,49 ⓑ −3,4,49−3,4,49
ⓒ −3,0.3–,95,4,49−3,0.3–,95,4,49 ⓓ −2−2
ⓔ −3,−2,0.3–,95,4,49−3,−2,0.3–,95,4,49

1.84

ⓐ 6,1216,121
ⓑ −25,−1,6,121−25,−1,6,121
ⓒ −25,−38,−1,6,121−25,−38,−1,6,121
ⓓ 2.041975...2.041975...
ⓔ −25,−38,−1,6,121,2.041975...−25,−38,−1,6,121,2.041975...

1.87

ⓐ

Figure shows a number line with numbers ranging from 0 to 1. 0.6 is highlighted.

ⓑ

Figure shows a number line with numbers ranging from minus 1.00 to 0.00. Minus 0.74 is highlighted, minus 0.25 is highlighted.
1.88

ⓐ

Figure shows a number line with numbers ranging from 0 to 1. 0.9 is highlighted.

ⓑ

Figure shows a number line with numbers ranging from minus 1.00 to 0.00. Minus 0.74 is highlighted.
1.89

32 r + 29 s 32 r + 29 s

1.90

41 m + 6 n 41 m + 6 n

1.91

1 7 15 1 7 15

1.92

1 2 9 1 2 9

1.93

−48 a −48 a

1.94

−92 x −92 x

1.95

5 49 5 49

1.96

11 25 11 25

1.97

ⓐ 0 ⓑ undefined

1.98

ⓐ 0 ⓑ undefined

1.99

4 x + 8 4 x + 8

1.100

6 x + 42 6 x + 42

1.101

5 y + 3 5 y + 3

1.102

4 n + 9 4 n + 9

1.103

70 + 15 p 70 + 15 p

1.104

4 + 35 d 4 + 35 d

1.105

−10 + 15 a −10 + 15 a

1.106

−56 + 105 y −56 + 105 y

1.107

− z + 11 − z + 11

1.108

− x + 4 − x + 4

1.109

3 − 3 x 3 − 3 x

1.110

2 x − 20 2 x − 20

1.111

5 x − 66 5 x − 66

1.112

7 x − 13 7 x − 13

Section 1.1 Exercises

1.

Divisible by 2, 3, 6

3.

Divisible by 2

5.

Divisible by 3, 5

7.

2 · 43 2 · 43

9.

5 · 7 · 13 5 · 7 · 13

11.

2 · 2 · 2 · 2 · 3 · 3 · 3 2 · 2 · 2 · 2 · 3 · 3 · 3

13.

24

15.

280

17.

440

19.

5

21.

58

23.

29

25.

149

27.

50

29.

5

31.

ⓐ 64 ⓑ 16 ⓒ 7

33.

21

35.

9

37.

10 x + 6 10 x + 6

39.

22 a + 1 22 a + 1

41.

17 x 2 + 20 x + 16 17 x 2 + 20 x + 16

43.

ⓐ 5x2−6xy5x2−6xy ⓑ 6y25x6y25x
ⓒ y2+21y2+21 ⓓ 81x2−6x81x2−6x

45.

ⓐ 4ab2+3a2b4ab2+3a2b ⓑ 20xy220xy2
ⓒ m+15m+15 ⓓ 121x2−9x121x2−9x

47.

ⓐ 8(y−9)8(y−9) ⓑ 8y−98y−9

49.

ⓐ 5(3x+y)5(3x+y) ⓑ 15x+y15x+y

51.

2 c + 14 2 c + 14

53.

3 n − 7 3 n − 7

55.

Answers will vary.

57.

Answers will vary.

Section 1.2 Exercises

59.

ⓐ >> ⓑ >> ⓒ >> ⓓ >>

61.

ⓐ == ⓑ == ⓒ >> ⓓ ==

63.

0

65.

8

67.

15

69.

1

71.

ⓐ −11−11 ⓑ −3−3 ⓒ 33

73.

32

75.

−22 −22

77.

29 29

79.

ⓐ 6 ⓑ −6−6 ⓒ −20−20 ⓓ 2020

81.

−59 −59

83.

22

85.

ⓐ 16 ⓑ 16

87.

ⓐ 45 ⓑ 45

89.

0

91.

4

93.

6

95.

ⓐ −32−32 ⓑ −65−65 ⓒ −4−4
ⓓ 1313

97.

ⓐ −4−4 ⓑ −12−12 ⓒ −39−39
ⓓ 1414

99.

ⓐ 6464 ⓑ −64−64

101.

−47 −47

103.

90 90

105.

9 9

107.

41 41

109.

−9 −9

111.

−29 −29

113.

1 1

115.

−3 −3

117.

5 5

119.

ⓐ −47−47 ⓑ 1616

121.

121 121

123.

−56 −56

125.

6 6

127.

( 3 + ( −15 ) ) + 7 ; − 5 ( 3 + ( −15 ) ) + 7 ; − 5

129.

ⓐ 10−(−18);2810−(−18);28
ⓑ −25−11;−36−25−11;−36

131.

−6 a + b −6 a + b

133.

96 ° 96 °

135.

21 yards

137.

− $ 28 − $ 28

139.

Answers will vary.

141.

Answers will vary.

Section 1.3 Exercises

143.

− 12 7 − 12 7

145.

10 21 10 21

147.

2 x 2 3 y 2 x 2 3 y

149.

− 21 a 2 11 b 2 − 21 a 2 11 b 2

151.

1 3 1 3

153.

− 21 50 − 21 50

155.

11 30 11 30

157.

9 n 9 n

159.

33 4 x 33 4 x

161.

− 4 9 − 4 9

163.

10 u 9 v 10 u 9 v

165.

− 1 16 − 1 16

167.

− 10 9 − 10 9

169.

− 2 5 − 2 5

171.

2 m 3 n 2 m 3 n

173.

29 24 29 24

175.

1 48 1 48

177.

17 105 17 105

179.

− 53 40 − 53 40

181.

1 12 1 12

183.

4 x + 3 12 4 x + 3 12

185.

ⓐ 5656 ⓑ 44

187.

ⓐ 25n1625n16 ⓑ 25n−163025n−1630

189.

ⓐ −8x−1518−8x−1518 ⓑ −10k27−10k27

191.

ⓐ −5(a+1)3−5(a+1)3 ⓑ aa

193.

9 7 9 7

195.

−8 −8

197.

11 6 11 6

199.

5 2 5 2

201.

54 54

203.

49 25 49 25

205.

15 4 15 4

207.

5 21 5 21

209.

5 4 5 4

211.

1 24 1 24

213.

−28 − 15 y 60 −28 − 15 y 60

215.

33 64 33 64

217.

7 9 7 9

219.

−5 −5

221.

23 24 23 24

223.

11 5 11 5

225.

1 1

227.

13 3 13 3

229.

ⓐ 1515 ⓑ 6565

231.

− 1 9 − 1 9

233.

− 5 11 − 5 11

235.

Answers will vary.

237.

Answers will vary.

Section 1.4 Exercises

239.

ⓐ 5.78 ⓑ 5.8 ⓒ 6

241.

ⓐ 0.30 ⓑ 0.3 ⓒ 0

243.

ⓐ 63.48 ⓑ 63.5 ⓒ 63

245.

−40.91 −40.91

247.

−7.22 −7.22

249.

−27.5 −27.5

251.

102.212 102.212

253.

51.31 51.31

255.

−4.89 −4.89

257.

−1200.47982 −1200.47982

259.

337.8914 337.8914

261.

1.305 1.305

263.

92.4 92.4

265.

2.5

267.

55200

269.

$ 2.44 $ 2.44

271.

−4.8 −4.8

273.

2.08 2.08

275.

1 25 1 25

277.

19 200 19 200

279.

0.85 0.85

281.

−12.4 −12.4

283.

0.71 0.71

285.

0.393 0.393

287.

156 % 156 %

289.

6.25 % 6.25 %

291.

8

293.

12

295.

−10 −10

297.

ⓐ 0,36,90,36,9 ⓑ −8,0,36,9−8,0,36,9 ⓒ −8,0,125,36,9−8,0,125,36,9 ⓓ 1.95286...,1.95286..., ⓔ −8,0,1.95286...,125,36,9−8,0,1.95286...,125,36,9

299.

ⓐ none ⓑ −100,−7,−1−100,−7,−1
ⓒ −100,−7,−83,−1,0.77,314−100,−7,−83,−1,0.77,314
ⓓ none
ⓔ −100,−7,−83,−1,0.77,314−100,−7,−83,−1,0.77,314

301.
Figure shows a number line with numbers ranging from 0 to 6. Some values are highlighted. From left to right, these are: 3 by 10, 11 by 6, 7 by 2 and 4.
303.
Figure shows a number line with numbers ranging from minus 4 to 4. Some values are highlighted. From left to right, these are: minus 5 by 2, minus 1 and two thirds, minus 3 by 4, 3 by 4, 1 and two thirds, and 5 by 2.
305.
Figure shows a number line with numbers ranging from minus 4 to 4. Two values are highlighted. One is between minus 2 and minus 1. The other is between 0 and 1.
307.
Figure shows a number line with numbers ranging from minus 4 to 4. Two values are highlighted. One is between minus 2 and minus 1. The other is between 3 and 4.
309.

Answers will vary.

311.

Answers will vary.

Section 1.5 Exercises

313.

27 m + ( −21 n ) 27 m + ( −21 n )

315.

5 4 g + 1 2 h 5 4 g + 1 2 h

317.

2.43 p + 8.26 q 2.43 p + 8.26 q

319.

−63 −63

321.

1 5 6 1 5 6

323.

17 17

325.

14.88 14.88

327.

10 p 10 p

329.

44 44

331.

7 8 7 8

333.

d d

335.

49 11 49 11

337.

0

339.

undefined

341.

undefined

343.

32 y + 72 32 y + 72

345.

6 c − 78 6 c − 78

347.

3 4 q + 3 3 4 q + 3

349.

5 y − 3 5 y − 3

351.

3 + 8 r 3 + 8 r

353.

36 d + 90 36 d + 90

355.

r s − 18 r r s − 18 r

357.

y p + 4 p y p + 4 p

359.

−28 p − 7 −28 p − 7

361.

−3 x + 18 −3 x + 18

363.

−3 x + 7 −3 x + 7

365.

−3 y − 8 −3 y − 8

367.

−33 c + 26 −33 c + 26

369.

− a + 19 − a + 19

371.

4 m − 10 4 m − 10

373.

72 x − 25 72 x − 25

375.

22 n + 9 22 n + 9

377.

6 c + 34 6 c + 34

379.

12 y + 63 12 y + 63

381.

Answers will vary.

383.

Answers will vary.

Review Exercises

385.

Divisible by 2,3,5,6,102,3,5,6,10

387.

120

389.

4

391.

3

393.

6 x 2 − x + 5 6 x 2 − x + 5

395.

ⓐ 11(y−2)11(y−2) ⓑ 11y−211y−2

397.

ⓐ == ⓑ == ⓒ >> ⓓ ==

399.

−9 −9

401.

ⓐ 8 ⓑ −8−8 ⓒ −22−22 ⓓ 22

403.

ⓐ 40 ⓑ 40

405.

ⓐ −3−3 ⓑ −15−15 ⓒ −56−56 ⓓ 17

407.

28

409.

−12 −12

411.

9

413.

( −4 + ( −9 ) ) + 23 ; 10 ( −4 + ( −9 ) ) + 23 ; 10

415.

46 ° 46 °

417.

− 15 x 3 11 y 2 − 15 x 3 11 y 2

419.

8 x 15 y 8 x 15 y

421.

31 36 31 36

423.

ⓐ 118118 ⓑ 5656

425.

− 1 6 − 1 6

427.

75

429.

− 1 5 − 1 5

431.

6.17 6.17

433.

96.978 96.978

435.

488.1813

437.

56.3 56.3

439.

−2.3 −2.3

441.

− 48 5 − 48 5

443.

1. 27 ¯ 1. 27 ¯

445.

4.75 % 4.75 %

447.

no real number

449.
Figure shows a number line with numbers ranging from minus 4 to 4. Some values are highlighted.
451.

3 4 x + y 3 4 x + y

453.

1 11 15 1 11 15

455.

9 17 9 17

457.

undefined

459.

8 b + 10 8 b + 10

461.

x p − 5 p x p − 5 p

463.

−6 x − 6 −6 x − 6

465.

6 y + 16 6 y + 16

Practice Test

467.

7 n + 7 7 n + 7

469.

−8 − 11 ; − 19 −8 − 11 ; − 19

( −8 − ( −3 ) ) + 5 ; 0 ( −8 − ( −3 ) ) + 5 ; 0

471.

ⓐ 28.1528.15 ⓑ 28.14628.146

473.
Figure shows a number line with numbers ranging from minus 4 to 4. Some values are highlighted.
475.

1

477.

−8 −8

479.

15 17 15 17

481.

− 5 3 − 5 3

483.

3 3

485.

− 7 6 − 7 6

487.

−65.4 −65.4

489.

−160

491.

1 8 13 1 8 13

493.

ⓐ 0 ⓑ undefined

495.

13 y − 3 13 y − 3