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Prealgebra

Chapter 6

PrealgebraChapter 6

Try It

6.1

89100

6.2

72100

6.3

62100,62%

6.4

41100,41%

6.5
  1. 1225
  2. 1110
6.6
  1. 1625
  2. 32
6.7
  1. 161250
  2. 23
6.8
  1. 113250
  2. 780
6.9
  1. 0.09
  2. 0.87
6.10
  1. ⓐ 0.03
  2. ⓑ 0.91
6.11
  1. ⓐ 1.15
  2. ⓑ 0.235
6.12
  1. ⓐ 1.23
  2. ⓑ 0.168
6.13
  1. 625
  2. 0.24
6.14
  1. 2250
  2. 0.44
6.15
  1. 310
  2. 0.3
6.16
  1. 12.5100
  2. 0.125
6.17
  1. 1%
  2. 17%
6.18
  1. 4%
  2. 41%
6.19
  1. 175%
  2. 8.25%
6.20
  1. 225%
  2. 9.25%
6.21
  1. 62.5%
  2. 275%
  3. 340%
6.22
  1. 87.5%
  2. 225%
  3. 160%
6.23

42.9%

6.24

57.1%

6.25

11.1%,or1119%

6.26

16.6%,or1623%

6.27

36

6.28

33

6.29

117

6.30

126

6.31

68

6.32

64

6.33

$26

6.34

$36

6.35

75%

6.36

80%

6.37

125%

6.38

175%

6.39

$14.67

6.40

$2.16

6.41

24.1 grams

6.42

2,375 mg

6.43

26%

6.44

37%

6.45

8.8%

6.46

50%

6.47

6.3%

6.48

10%

6.49
  1. ⓐ $45.25
  2. ⓑ $769.25
6.50
  1. ⓐ $20.50
  2. ⓑ $270.50
6.51

9%

6.52

7.5%

6.53

$273

6.54

$394.20

6.55

4%

6.56

5.5%

6.57

$450

6.58

$82

6.59
  1. ⓐ $11.60
  2. ⓑ $17.40
6.60
  1. ⓐ $256.75
  2. ⓑ $138.25
6.61
  1. $184.80
  2. 33%
6.62
  1. $60
  2. 15%
6.63
  1. 600%
  2. $1,800
6.64
  1. $2,975
  2. $11,475
6.65

$160

6.66

$56

6.67

$2,750

6.68

$3,560

6.69

4.5%

6.70

6.5%

6.71

$142.50

6.72

$7,020

6.73

6%

6.74

4%

6.75

$11,450

6.76

$9,600

6.77

$57.00

6.78

$143.50

6.79
  1. 59=2036
  2. 711=2844
  3. 2.508=3.7512
6.80
  1. 67=3642
  2. 836=1254
  3. 3.756=2.504
6.81
  1. ⓐ no
  2. ⓑ yes
6.82
  1. ⓐ no
  2. ⓑ no
6.83

77

6.84

104

6.85

65

6.86

24

6.87

−7

6.88

−9

6.89

12 ml

6.90

180 mg

6.91

300

6.92

5

6.93

590 Euros

6.94

56,460 yen

6.95

n105=60100

6.96

n85=40100

6.97

36n=25100

6.98

27n=36100

6.99

n100=3952

6.100

n100=2392

6.101

26

6.102

34

6.103

80

6.104

147

6.105

38

6.106

64

6.107

37.5%

6.108

25%

Section 6.1 Exercises

1.

6100

3.

321000

5.
  1. 57100
  2. 57%
7.
  1. 42100
  2. 42%
9.

125

11.

17100

13.

1325

15.

54

17.

38

19.

23125

21.

19200

23.

475

25.

0.05

27.

0.01

29.

0.63

31.

0.4

33.

1.15

35.

1.5

37.

0.214

39.

0.078

41.
  1. 3200
  2. 0.015
43.
  1. 702310,000
  2. 0.7023
45.
  1. 14
  2. 0.25
47.
  1. 35
  2. 0.6
49.

1%

51.

18%

53.

135%

55.

300%

57.

0.9%

59.

8.75%

61.

150%

63.

225.4%

65.

25%

67.

37.5%

69.

175%

71.

680%

73.

41.7%

75.

266.6%

77.

42.9%

79.

55.6%

81.

25%

83.

35%

87.
  1. 110
  2. approximately $9.50
90.

1720;0.85

92.

80%; 0.8

94.

14,12,34,1.

96.

The Szetos sold their home for five times what they paid 30 years ago.

Section 6.2 Exercises

98.

54

100.

26.88

102.

162.5

104.

18,000

106.

112

108.

108

110.

$35

112.

$940

114.

30%

116.

36%

118.

150%

120.

175%

122.

$11.88

124.

$259.80

126.

24.2 grams

128.

2,407 grams

130.

45%

132.

25%

134.

13.2%

136.

125%

138.

72.7%

140.

2.5%

142.

11%

144.

5.5%

146.

21.2%

148.

The original number should be greater than 44.80% is less than 100%, so when 80% is converted to a decimal and multiplied to the base in the percent equation, the resulting amount of 44 is less. 44 is only the larger number in cases where the percent is greater than 100%.

150.

Alex should have packed half as many shorts and twice as many shirts.

Section 6.3 Exercises

152.
  1. $4.20
  2. $88.20
154.
  1. $9.68
  2. $138.68
156.
  1. $17.13
  2. $267.13
158.
  1. $61.45
  2. $1,260.45
160.

6.5%

162.

6.85%

164.

$20.25

166.

$975

168.

$859.25

170.

3%

172.

16%

174.

15.5%

176.

$139

177.

$81

178.

$125

180.
  1. $26.97
  2. $17.98
182.
  1. $128.37
  2. $260.63
184.
  1. $332.48
  2. $617.50
186.
  1. $576
  2. 30%
188.
  1. $53.25
  2. 15%
190.
  1. $370
  2. 43.5%
192.
  1. $7.20
  2. $23.20
194.
  1. $0.20
  2. 44.2%
196.
  1. $258.75
  2. $373.75
198.
  1. $131.25
  2. $126.25
  3. 25% off first, then $20 off
200.
  1. Priam is correct. The original price is 100%. Since the discount rate was 40%, the sale price was 60% of the original price.
  2. Yes.

Section 6.4 Exercises

202.

$180

204.

$14,000

206.

6.3%

208.

$90

210.

$579.96

212.

$14,167

214.

$3,280

216.

$860

218.

$24,679.91

220.

4%

222.

5.5%

224.

$116

226.

$4,836

228.

3%

230.

3.75%

232.

$35,000

234.

$3,345

236.

$332.10

238.

$195.00

240.

Answers will vary.

242.

Answers will vary.

Section 6.5 Exercises

244.

415=36135

246.

125=9640

248.

57=115161

250.

81=486

252.

9.3618=2.605

254.

18.0411=4.923

256.

yes

258.

no

260.

no

262.

yes

264.

49

266.

7

268.

9

270.

−11

272.

7

274.

2

276.

0.6

278.

4

280.

9 ml

282.

114, no

284.

159 cal

286.

34cup

288.

$252.50

290.

1.25

292.

48 quarters

294.

19, $58.71

296.

12.8 hours

298.

4 bags

300.

n250=35100

302.

n47=110100

304.

45n=30100

306.

90n=150100

308.

1785=p100

310.

340260=p100

312.

117

313.

165

314.

16.56

316.

45.5

318.

1464

320.

$45

322.

$164

324.

25%

326.

12.5%

328.

20, 32

330.

Answers will vary.

Review Exercises

332.

32100

334.

13100,13%

336.

1225

338.

6411000

340.

0.06

342.

1.28

344.
  1. 27200
  2. 0.135
346.
  1. 12
  2. 0.5
348.

4%

350.

282%

352.

0.3%

354.

75%

356.

362.5%

358.

40%

360.

161

362.

240

364.

25

366.

68%

368.

$16.70

370.

28.4%

372.

4%

374.
  1. ⓐ $45
  2. ⓑ $795
376.

7.25%

378.

$11,400

380.

15%

382.

$45

384.
  1. $25.47
  2. $59.43
386.
  1. ⓐ $13
  2. ⓑ 26%
388.
  1. ⓐ $0.48
  2. ⓑ $1.28
390.

$450

392.

$4400

394.

$900

396.

2.5%

398.

38=1232

400.

118=23414

402.

yes

404.

no

406.

20

408.

4

410.

12

412.

340

414.

13 gallons

416.

n395=62100

418.

151000=p100

420.

765

422.

$78

Practice Test

424.

0.24,625

426.

3.5,312

428.

33.333%

430.

25%

432.

40

434.

11.9%

436.

4%

438.

$50

440.

6.2%

442.

−52

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