12.4.2: Chapter 2

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Be Prepared

2.1

$112$

2.2

$180, 096$

2.3

$807$

2.4

expression

2.5

$1, 024$

2.6

$73$

2.7

$19$

2.8

$42$

2.9

$x - 8$

2.10

$4$ and $215$

2.11

$15$

2.12

$2, 3, 5, 6, 10$

2.13

prime

2.13

$2^{4}$

Try It

2.1

ⓐ 18 plus 11; the sum of eighteen and eleven
ⓑ 27 times 9; the product of twenty-seven and nine
ⓒ 84 divided by 7; the quotient of eighty-four and seven
ⓓ p minus q; the difference of p and q

2.2

ⓐ 47 minus 19; the difference of forty-seven and nineteen
ⓑ 72 divided by 9; the quotient of seventy-two and nine
ⓒ m plus n; the sum of m and n
ⓓ 13 times 7; the product of thirteen and seven

2.3

ⓐ fourteen is less than or equal to twenty-seven
ⓑ nineteen minus two is not equal to eight
ⓒ twelve is greater than four divided by two
ⓓ x minus seven is less than one

2.4

ⓐ nineteen is greater than or equal to fifteen
ⓑ seven is equal to twelve minus five
ⓒ fifteen divided by three is less than eight
ⓓ y minus three is greater than six

2.5

ⓐ >
ⓑ <

2.6

ⓐ <
ⓑ >

2.7

ⓐ equation
ⓑ expression

2.8

ⓐ expression
ⓑ equation

2.9

41⁵

2.10

7⁹

2.11

ⓐ 4 · 4 · 4 · 4 · 4 · 4 · 4 · 4
ⓑ a · a · a · a · a · a · a

2.12

ⓐ 8 · 8 · 8 · 8 · 8 · 8 · 8 · 8
ⓑ b · b · b · b · b · b

2.13

ⓐ 125
ⓑ 1

2.14

ⓐ 49
ⓑ 0

2.15

ⓐ 2
ⓑ 14

2.16

ⓐ 35
ⓑ 99

2.17

2.18

2.19

2.20

2.21

2.22

2.23

2.24

2.25

ⓐ 10
ⓑ 19

2.26

ⓐ 4
ⓑ 12

2.27

ⓐ 13
ⓑ 5

2.28

ⓐ 8
ⓑ 16

2.29

2.30

216

2.31

2.32

2.33

2.34

2.35

2.36

2.37

The terms are 4x, 3b, and 2. The coefficients are 4, 3, and 2.

2.38

The terms are 9a, 13a², and a³, The coefficients are 9, 13, and 1.

2.39

9 and 15; 2x³ and 8x³; y² and 11y²

2.40

4x³ and 6x³; 8x² and 3x²; 19 and 24

2.41

16x + 17

2.42

17y + 7

2.43

4x² + 14x

2.44

12y² + 15y

2.45

ⓐ 47 − 41
ⓑ 5x ÷ 2

2.46

ⓐ 17 + 19
ⓑ 7x

2.47

ⓐ x + 11
ⓑ 11a − 14

2.48

ⓐ j + 19
ⓑ 2x − 21

2.49

ⓐ 4(p + q)
ⓐ 4p + q

2.50

ⓐ 2x − 8
ⓑ 2(x − 8)

2.51

w − 5

2.52

l + 2

2.53

6q − 7

2.54

4n + 8

2.55

2.56

yes

2.57

yes

2.58

yes

2.59

x + 1 = 7; x = 6

2.60

x + 3 = 4; x = 1

2.61

x = 13

2.62

x = 5

2.63

y = 28

2.64

y = 46

2.65

x = 22

2.66

y = 4

2.67

a = 37

2.68

n = 41

2.69

7 + 6 = 13

2.70

8 + 6 = 14

2.71

6 ⋅ 9 = 54

2.72

21 ⋅ 3 = 63

2.73

2(x − 5) = 30

2.74

2(y − 4) = 16

2.75

x + 7 = 37; x = 30

2.76

y + 11 = 28; y = 17

2.77

z − 17 = 37; z = 54

2.78

x − 19 = 45; x = 64

2.79

ⓐ yes
ⓑ no

2.80

ⓐ no
ⓑ yes

2.81

ⓐ yes
ⓑ no

2.82

ⓐ no
ⓑ yes

2.83

ⓐ no
ⓑ yes

2.84

ⓐ yes
ⓑ no

2.85

ⓐ yes
ⓑ no

2.86

ⓐ no
ⓑ yes

2.87

Divisible by 2, 3, 5, and 10

2.88

Divisible by 2 and 3, not 5 or 10.

2.89

Divisible by 2, 3, not 5 or 10.

2.90

Divisible by 3 and 5.

2.91

1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 96

2.92

1, 2, 4, 5, 8, 10, 16, 20, 40, 80

2.93

composite

2.94

prime

2.95

2 ⋅ 2 ⋅ 2 ⋅ 2 ⋅ 5, or 2⁴ ⋅ 5

2.96

2 ⋅ 2 ⋅ 3 ⋅ 5, or 2² ⋅ 3 ⋅ 5

2.97

2 ⋅ 3 ⋅ 3 ⋅ 7, or 2 ⋅ 3² ⋅ 7

2.98

2 ⋅ 3 ⋅ 7 ⋅ 7, or 2 ⋅ 3 ⋅ 7²

2.99

2 ⋅ 2 ⋅ 2 ⋅ 2 ⋅ 5, or 2⁴ ⋅ 5

2.100

2 ⋅ 2 ⋅ 3 ⋅ 5, or 2² ⋅ 3 ⋅ 5

2.101

2 ⋅ 3 ⋅ 3 ⋅ 7, or 2 ⋅ 3² ⋅ 7

2.102

2 ⋅ 3 ⋅ 7 ⋅ 7, or 2 ⋅ 3 ⋅ 7²

2.103

2.104

2.105

2.106

105

2.107

440

2.108

360

Section 2.1 Exercises

16 minus 9, the difference of sixteen and nine

5 times 6, the product of five and six

28 divided by 4, the quotient of twenty-eight and four

x plus 8, the sum of x and eight

2 times 7, the product of two and seven

11.

fourteen is less than twenty-one

13.

thirty-six is greater than or equal to nineteen

15.

3 times n equals 24, the product of three and n equals twenty-four

17.

y minus 1 is greater than 6, the difference of y and one is greater than six

19.

2 is less than or equal to 18 divided by 6; 2 is less than or equal to the quotient of eighteen and six

21.

a is not equal to 7 times 4, a is not equal to the product of seven and four

23.

equation

25.

expression

27.

expression

29.

equation

31.

3⁷

33.

x ⁵

35.

5x5x5

37.

2x2x2x2x2x2x2x2

39.

ⓐ 43
ⓑ 55

41.

43.

45.

47.

49.

51.

53.

55.

57.

59.

61.

149

63.

Section 2.2 Exercises

69.

71.

73.

144

75.

77.

79.

81.

83.

84.

225

85.

87.

89.

15x², 6x, 2

91.

10y³, y, 2

93.

95.

97.

x³ and 8x³; 14 and 5

99.

16ab and 4ab; 16b² and 9b²

101.

13x

103.

26a

105.

107.

12x + 8

109.

10u + 3

111.

12p + 10

113.

22a + 1

115.

17x² + 20x + 16

117.

8 + 12

119.

14 − 9

121.

9 ⋅ 7

123.

36 ÷ 9

125.

x − 4

127.

129.

8x + 3x

131.

y ÷ 3

133.

8 (y − 9)

135.

5 (x + y)

137.

b + 15

139.

b − 4

141.

2n − 7

143.

He will pay $750. His insurance company will pay $1350.

Section 2.3 Exercises

147.

ⓐ yes
ⓑ no

149.

ⓐ no
ⓑ yes

151.

ⓐ yes
ⓑ no

153.

ⓐ no
ⓑ yes

155.

ⓐ no
ⓑ yes

157.

ⓐ no
ⓑ yes

159.

x + 2 = 5; x = 3

161.

x + 3 = 6; x = 3

163.

a = 16

165.

p = 5

167.

r = 24

169.

x = 7

171.

p = 69

173.

d = 67

175.

y = 22

177.

u = 30

179.

f = 178

181.

n = 32

183.

p = 48

185.

y = 467

187.

8 + 9 = 17

189.

23 − 19 = 4

191.

3 ⋅ 9 = 27

193.

54 ÷ 6 = 9

195.

2(n − 10) = 52

197.

3y + 10 = 100

199.

p + 5 = 21; p = 16

201.

r + 18 = 73; r = 55

203.

d − 30 = 52; d = 82

205.

u − 12 = 89; u = 101

207.

c − 325 = 799; c = 1124

209.

$1300

211.

$460

Section 2.4 Exercises

215.

2, 4, 6, 8, 10 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48

217.

4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48

219.

6, 12, 18, 24, 30, 36, 42, 48

221.

8, 16, 24, 32, 40, 48

223.

10, 20, 30, 40

225.

Divisible by 2, 3, 4, 6

227.

Divisible by 3, 5

229.

Divisible by 2, 3, 4, 6

231.

Divisible by 2, 3, 4, 5, 6, 10

233.

Divisible by 2, 4

235.

Divisible by 3, 5

237.

Divisible by 2, 5, 10

239.

Divisible by 2, 5, 10

241.

Divisible by 3, 5

243.

1, 2, 3, 4, 6, 9, 12, 18, 36

245.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

247.

1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72,144

249.

1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 84, 98, 147, 196, 294, 588

251.

prime

253.

composite

255.

prime

257.

composite

259.

composite

261.

composite

263. $This table has nine rows and three columns. The first row is a header row that labels each column. The first column is labeled “Weeks after opening the account”, the second is labeled “Total number of dollars Gina put in the account”, and the last is labeled “Simplified Total”. Under the “Weeks after opening the account” column are the values: 0, 1, 2, 3, 4, 5, 6, 20, and the letter x. Under the “Total number of dollars Gina put in the account” column are the expressions: 75; 75 plus 20; 75 plus 20 times 2; 75 plus 20 times 3; 75 plus 20 times empty set of brackets; 75 plus empty set of brackets; the last three rows are blank. Under the “Simplified Total” column are the values: 75, 95, 115, the last six rows are blank.$

Section 2.5 Exercises

267.

2 ⋅ 43

269.

2 ⋅ 2 ⋅ 3 ⋅ 11

271.

3 ⋅ 3 ⋅ 7 ⋅ 11

273.

5 ⋅ 23

275.

3 ⋅ 3 ⋅ 5 ⋅ 5 ⋅ 11

277.

2 ⋅ 2 ⋅ 2 ⋅ 7

279.

2 ⋅ 2 ⋅ 2 ⋅ 3 ⋅ 7

281.

17 ⋅ 23

283.

2 ⋅ 2 ⋅ 2 ⋅ 2 ⋅ 3 ⋅ 3 ⋅ 3

285.

2 ⋅ 2 ⋅ 2 ⋅ 2 ⋅ 3 ⋅ 3 ⋅ 3 ⋅ 5

287.

2 ⋅ 3 ⋅ 5 ⋅ 5

289.

3 ⋅ 5 ⋅ 5 ⋅ 7

291.

2 ⋅ 2 ⋅ 3 ⋅ 3

293.

2 ⋅ 5 ⋅ 5 ⋅ 7

295.

297.

299.

120

301.

300

303.

305.

120

307.

420

309.

311.

120

313.

Review Exercises

317.

3 times 8, the product of three and eight.

319.

24 divided by 6, the quotient of twenty-four and six.

321.

50 is greater than or equal to 47

323.

The sum of n and 4 is equal to 13

325.

equation

327.

expression

329.

2³

331.

x ⁶

333.

8 ⋅ 8 ⋅ 8 ⋅ 8

335.

y ⋅ y ⋅ y ⋅ y ⋅ y

337.

339.

128

341.

343.

345.

347.

349.

351.

353.

12n²,3n, 1

355.

357.

3 and 4; 3x and x

359.

24a

361.

14x

363.

12n + 11

365.

10y² + 2y + 3

367.

x − 6

369.

3n ⋅ 9

371.

5(y + 1)

373.

c + 3

375.

ⓐ yes
ⓑ no

377.

ⓐ yes
ⓑ no

379.

ⓐ no
ⓑ yes

381.

x + 3 = 5; x = 2

383.

c = 6

385.

x = 11

387.

y = 23

389.

p = 34

391.

7 + 33 = 40

393.

4 ⋅ 8 = 32

395.

2(n − 3) = 76

397.

x + 8 = 35; x = 27

399.

q − 18 = 57; q = 75

401.

h = 42

403.

z = 33

405.

q = 8

407.

v = 56

409.

3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48

411.

8, 16, 24, 32, 40, 48

413.

2, 3, 6

415.

2, 3, 5, 6, 10

417.

1, 2, 3, 5, 6, 10, 15, 30

419.

1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180

421.

prime

423.

composite

425.

2 ⋅ 2 ⋅ 3 ⋅ 7

427.

2 ⋅ 5 ⋅ 5 ⋅ 7

429.

431.

175

433.

Answers will vary

Practice Test

435.

15 minus x, the difference of fifteen and x.

437.

equation

439.

ⓐ n⁶
ⓑ 3 ⋅ 3 ⋅ 3 ⋅ 3 ⋅ 3 = 243

441.

443.

445.

447.

125

449.

451.

x + 5

453.

3(a − b)

455.

n = 31

457.

y − 15 = 32; y = 47

459.

4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48

461.

2³ ⋅ 3³ ⋅ 5

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Be Prepared

Try It

Section 2.1 Exercises

Section 2.2 Exercises

Section 2.3 Exercises

Section 2.4 Exercises

Section 2.5 Exercises

Review Exercises

Practice Test