Contents

Preface
1Foundations
- Introduction
- 1.1Use the Language of Algebra
- 1.2Integers
- 1.3Fractions
- 1.4Decimals
- 1.5Properties of Real Numbers
- Chapter Review
  Key Terms
  Key Concepts
- Exercises
  Review Exercises
  Practice Test
2Solving Linear Equations
3Graphs and Functions
4Systems of Linear Equations
5Polynomials and Polynomial Functions
6Factoring
7Rational Expressions and Functions
8Roots and Radicals
9Quadratic Equations and Functions
10Exponential and Logarithmic Functions
11Conics
12Sequences, Series and Binomial Theorem
- Introduction
- 12.1Sequences
- 12.2Arithmetic Sequences
- 12.3Geometric Sequences and Series
- 12.4Binomial Theorem
- Chapter Review
  Key Terms
Answer Key
Index

Chapter 1

Try It

Show solution

1.1

ⓐ yes ⓑ yes ⓒ no ⓓ yes
ⓔ no

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1.2

ⓐ no ⓑ yes ⓒ yes ⓓ no
ⓔ no

Show solution

1.3

$2 \cdot 2 \cdot 2 \cdot 2 \cdot 5 2 \cdot 2 \cdot 2 \cdot 2 \cdot 5$

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1.4

$2 \cdot 2 \cdot 3 \cdot 5 2 \cdot 2 \cdot 3 \cdot 5$

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1.5

$3636$

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1.6

$7272$

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1.7

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1.8

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1.9

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1.10

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1.11

ⓐ 9 ⓑ 64 ⓒ40

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1.12

ⓐ 216 ⓑ 64 ⓒ 185

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1.13

$10 x^{2} + 16 x + 17 10 x^{2} + 16 x + 17$

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1.14

$12 y^{2} + 9 y + 7 12 y^{2} + 9 y + 7$

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1.15

ⓐ $14 x^{2} - 13 14 x^{2} - 13$ ⓑ $12 x \div 2 12 x \div 2$
ⓒ $z + 13 z + 13$ ⓓ $8 x - 18 8 x - 18$

Show solution

1.16

ⓐ $17 y^{2} + 19 17 y^{2} + 19$ ⓑ $7 y 7 y$
ⓒ $x + 11 x + 11$ ⓓ $11 a - 14 11 a - 14$

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1.17

ⓐ $4 (p + q) 4 (p + q)$ ⓑ $4 p + q 4 p + q$

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1.18

ⓐ $2 x - 8 2 x - 8$ ⓑ $2 (x - 8) 2 (x - 8)$

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1.19

$w - 7 w - 7$

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1.20

$l - 6 l - 6$

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1.21

$4 q - 8 4 q - 8$

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1.22

$7 n + 3 7 n + 3$

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1.23

ⓐ $> >$ ⓑ $> >$ ⓒ $< <$
ⓓ $= =$

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1.24

ⓐ $> >$ ⓑ $= =$ ⓒ $> >$
ⓓ $< <$

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1.25

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1.26

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1.27

ⓐ $−6 −6$ ⓑ 2 ⓒ $−2 −2$

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1.28

ⓐ $−7 −7$ ⓑ 3 ⓒ $−3 −3$

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1.29

ⓐ 2 ⓑ $−2 −2$ ⓒ $−10 −10$ ⓓ 10

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1.30

ⓐ 3 ⓑ $−3 −3$ ⓒ $−11 −11$ ⓓ 11

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1.31

ⓐ $8, 8 8, 8$ ⓑ $−18, −18,$ $−18 −18$
ⓒ $19, 19 19, 19$ ⓓ $−4, −4,$ $−4 −4$

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1.32

ⓐ $8, 8 8, 8$ ⓑ $−22, −22,$ $−22 −22$
ⓒ $23, 23 23, 23$ ⓓ $3, 3 3, 3$

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1.33

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1.34

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1.35

ⓐ 23 ⓑ 60 ⓒ $−63 −63$ ⓓ $−9 −9$

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1.36

ⓐ 39 ⓑ 39 ⓒ −28 ⓓ −7

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1.37

ⓐ 81 ⓑ $−81 −81$

Show solution

1.38

ⓐ 49 ⓑ $−49 −49$

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1.39

ⓐ 4 ⓑ 21

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1.40

ⓐ 9 ⓑ 6

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1.41

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1.42

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1.43

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

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1.44

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

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1.45

The difference in temperatures was 45 degrees Fahrenheit.

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1.46

The difference in temperatures was 9 degrees.

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1.47

$- \frac{23}{40} - \frac{23}{40}$

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1.48

$- \frac{5}{8} - \frac{5}{8}$

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1.49

$−33 a −33 a$

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1.50

$−26 b −26 b$

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1.51

$\frac{4}{15} \frac{4}{15}$

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1.52

$\frac{2}{3} \frac{2}{3}$

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1.53

$\frac{3}{4 b} \frac{3}{4 b}$

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1.54

$\frac{4}{q} \frac{4}{q}$

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1.55

$\frac{79}{60} \frac{79}{60}$

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1.56

$\frac{103}{60} \frac{103}{60}$

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1.57

ⓐ $\frac{27 a - 32}{36} \frac{27 a - 32}{36}$ ⓑ $\frac{2 a}{3} \frac{2 a}{3}$

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1.58

ⓐ $\frac{24 k - 5}{30} \frac{24 k - 5}{30}$ ⓑ $\frac{2 k}{15} \frac{2 k}{15}$

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1.59

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1.60

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1.61

$\frac{1}{90} \frac{1}{90}$

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1.62

272

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1.63

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1.64

$\frac{2}{7} \frac{2}{7}$

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1.65

$- \frac{1}{2} - \frac{1}{2}$

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1.66

$\frac{2}{3} \frac{2}{3}$

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1.67

ⓐ $6.58 6.58$ ⓑ $6.6 6.6$ ⓒ 7

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1.68

ⓐ $15.218 15.218$ ⓑ $15.22 15.22$
ⓒ $15.2 15.2$

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1.69

ⓐ $−16.49 −16.49$ ⓑ $−0.42 −0.42$

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1.70

ⓐ $−23.593 −23.593$ ⓑ $−12.58 −12.58$

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1.71

$−27.4815 −27.4815$

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1.72

$−87.6148 −87.6148$

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1.73

ⓐ 25.8 ⓑ 258 ⓒ 2,580

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1.74

ⓐ 142 ⓑ 1,420 ⓒ 14,200

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1.75

$587.3 587.3$

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1.76

$34.25 34.25$

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1.77

ⓐ $\frac{117}{500} \frac{117}{500}$ ⓑ $−0.875 −0.875$

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1.78

ⓐ $\frac{3}{125} \frac{3}{125}$ ⓑ $−0.375 −0.375$

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1.79

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

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1.80

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

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1.81

ⓐ 6 ⓑ 13 ⓒ $−15 −15$

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1.82

ⓐ 4 ⓑ 14 ⓒ $−10 −10$

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1.83

ⓐ $4, \sqrt{49} 4, \sqrt{49}$ ⓑ $−3, 4, \sqrt{49} −3, 4, \sqrt{49}$
ⓒ $−3, 0. \bar{3}, \frac{9}{5}, 4, \sqrt{49} −3, 0. \bar{3}, \frac{9}{5}, 4, \sqrt{49}$ ⓓ $− \sqrt{2} − \sqrt{2}$
ⓔ $−3, − \sqrt{2}, 0. \bar{3}, \frac{9}{5}, 4, \sqrt{49} −3, − \sqrt{2}, 0. \bar{3}, \frac{9}{5}, 4, \sqrt{49}$

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1.84

ⓐ $6, \sqrt{121} 6, \sqrt{121}$
ⓑ $− \sqrt{25}, −1, 6, \sqrt{121} − \sqrt{25}, −1, 6, \sqrt{121}$
ⓒ $− \sqrt{25}, - \frac{3}{8}, −1, 6, \sqrt{121} − \sqrt{25}, - \frac{3}{8}, −1, 6, \sqrt{121}$
ⓓ $2.041975.. . 2.041975.. .$
ⓔ $− \sqrt{25}, - \frac{3}{8}, −1, 6, \sqrt{121}, 2.041975.. . − \sqrt{25}, - \frac{3}{8}, −1, 6, \sqrt{121}, 2.041975.. .$

Show solution

1.85

Figure shows a number line with numbers ranging from minus 4 to 5. Various points on the line are highlighted. From left to right, these are: minus 8 by 3, minus 7 by 4, minus 1, 1 by 3, 6 by 5, 9 by 2 and 5.

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1.86

Figure shows a number line with numbers ranging from minus 4 to 5. Various points on the line are highlighted. From left to right, these are: minus 7 by 3, minus 2, minus 7 by 4, 2 by 3, 7 by 5, 3 and 7 by 2.

Show solution

1.87

ⓐ

ⓑ

Show solution

1.88

ⓐ

ⓑ

Show solution

1.89

$32 r + 29 s 32 r + 29 s$

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1.90

$41 m + 6 n 41 m + 6 n$

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1.91

$1 \frac{7}{15} 1 \frac{7}{15}$

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1.92

$1 \frac{2}{9} 1 \frac{2}{9}$

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1.93

$−48 a −48 a$

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1.94

$−92 x −92 x$

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1.95

$\frac{5}{49} \frac{5}{49}$

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1.96

$\frac{11}{25} \frac{11}{25}$

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1.97

ⓐ 0 ⓑ undefined

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1.98

ⓐ 0 ⓑ undefined

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1.99

$4 x + 8 4 x + 8$

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1.100

$6 x + 42 6 x + 42$

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1.101

$5 y + 3 5 y + 3$

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1.102

$4 n + 9 4 n + 9$

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1.103

$70 + 15 p 70 + 15 p$

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1.104

$4 + 35 d 4 + 35 d$

Show solution

1.105

$−10 + 15 a −10 + 15 a$

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1.106

$−56 + 105 y −56 + 105 y$

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1.107

$− z + 11 − z + 11$

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1.108

$− x + 4 − x + 4$

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1.109

$3 - 3 x 3 - 3 x$

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1.110

$2 x - 20 2 x - 20$

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1.111

$5 x - 66 5 x - 66$

Show solution

1.112

$7 x - 13 7 x - 13$

Section 1.1 Exercises

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Divisible by 2, 3, 6

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Divisible by 2

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Divisible by 3, 5

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$2 \cdot 43 2 \cdot 43$

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$5 \cdot 7 \cdot 13 5 \cdot 7 \cdot 13$

Show solution

11.

$2 \cdot 2 \cdot 2 \cdot 2 \cdot 3 \cdot 3 \cdot 3 2 \cdot 2 \cdot 2 \cdot 2 \cdot 3 \cdot 3 \cdot 3$

Show solution

13.

Show solution

15.

420

Show solution

17.

440

Show solution

19.

Show solution

21.

Show solution

23.

Show solution

25.

149

Show solution

27.

Show solution

29.

Show solution

31.

ⓐ 64 ⓑ 16 ⓒ 7

Show solution

33.

Show solution

35.

Show solution

37.

$10 x + 6 10 x + 6$

Show solution

39.

$22 a + 1 22 a + 1$

Show solution

41.

$17 x^{2} + 20 x + 16 17 x^{2} + 20 x + 16$

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43.

ⓐ $5 x^{2} - 6 x y 5 x^{2} - 6 x y$ ⓑ $\frac{6 y^{2}}{5 x} \frac{6 y^{2}}{5 x}$
ⓒ $y^{2} + 21 y^{2} + 21$ ⓓ $81 x^{2} - 6 x 81 x^{2} - 6 x$

Show solution

45.

ⓐ $4 a b^{2} + 3 a^{2} b 4 a b^{2} + 3 a^{2} b$ ⓑ $20 x y^{2} 20 x y^{2}$
ⓒ $m + 15 m + 15$ ⓓ $121 x^{2} - 9 x 121 x^{2} - 9 x$

Show solution

47.

ⓐ $8 (y - 9) 8 (y - 9)$ ⓑ $8 y - 9 8 y - 9$

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49.

ⓐ $5 (3 x + y) 5 (3 x + y)$ ⓑ $15 x + y 15 x + y$

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51.

$14 > 2 c 14 > 2 c$

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53.

$3 n - 7 3 n - 7$

Show solution

55.

Answers will vary.

Show solution

57.

Answers will vary.

Section 1.2 Exercises

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59.

ⓐ $> >$ ⓑ $> >$ ⓒ $> >$ ⓓ $> >$

Show solution

61.

ⓐ $= =$ ⓑ $= =$ ⓒ $> >$ ⓓ $= =$

Show solution

63.

Show solution

65.

Show solution

67.

Show solution

69.

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71.

ⓐ $−11 −11$ ⓑ $−3 −3$ ⓒ $33$

Show solution

73.

Show solution

75.

$−22 −22$

Show solution

77.

$2929$

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79.

ⓐ 6 ⓑ $−6 −6$ ⓒ $−20 −20$ ⓓ $2020$

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81.

$−59 −59$

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83.

Show solution

85.

ⓐ 16 ⓑ16

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87.

ⓐ 45 ⓑ45

Show solution

89.

Show solution

91.

Show solution

93.

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95.

ⓐ $−32 −32$ ⓑ $−65 −65$ ⓒ $−4 −4$
ⓓ $1313$

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97.

ⓐ $−4 −4$ ⓑ $−12 −12$ ⓒ $−39 −39$
ⓓ $1414$

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99.

ⓐ $6464$ ⓑ $−64 −64$

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101.

$−47 −47$

Show solution

103.

$9090$

Show solution

105.

$99$

Show solution

107.

$4141$

Show solution

109.

$−9 −9$

Show solution

111.

$−29 −29$

Show solution

113.

$11$

Show solution

115.

$−3 −3$

Show solution

117.

$55$

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119.

ⓐ $−47 −47$ ⓑ $1616$

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121.

$121121$

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123.

$−56 −56$

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125.

$66$

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127.

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

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129.

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

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131.

$\frac{−6}{a + b} \frac{−6}{a + b}$

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133.

$96 ° 96 °$

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135.

Show solution

137.

$− $ 28 − $ 28$

Show solution

139.

Answers will vary.

Show solution

141.

Answers will vary.

Section 1.3 Exercises

Show solution

143.

$- \frac{12}{7} - \frac{12}{7}$

Show solution

145.

$\frac{10}{21} \frac{10}{21}$

Show solution

147.

$\frac{2 x^{2}}{3 y} \frac{2 x^{2}}{3 y}$

Show solution

149.

$- \frac{21 a^{2}}{11 b^{2}} - \frac{21 a^{2}}{11 b^{2}}$

Show solution

151.

$\frac{1}{3} \frac{1}{3}$

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153.

$- \frac{21}{50} - \frac{21}{50}$

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155.

$\frac{11}{30} \frac{11}{30}$

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157.

$9 n 9 n$

Show solution

159.

$\frac{33}{4 x} \frac{33}{4 x}$

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161.

$- \frac{4}{9} - \frac{4}{9}$

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163.

$\frac{10 u}{9 v} \frac{10 u}{9 v}$

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165.

$- \frac{1}{16} - \frac{1}{16}$

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167.

$- \frac{10}{9} - \frac{10}{9}$

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169.

$- \frac{2}{5} - \frac{2}{5}$

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171.

$\frac{2 m}{3 n} \frac{2 m}{3 n}$

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173.

$\frac{29}{24} \frac{29}{24}$

Show solution

175.

$\frac{1}{48} \frac{1}{48}$

Show solution

177.

$\frac{17}{105} \frac{17}{105}$

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179.

$- \frac{53}{40} - \frac{53}{40}$

Show solution

181.

$\frac{1}{12} \frac{1}{12}$

Show solution

183.

$\frac{4 x + 3}{12} \frac{4 x + 3}{12}$

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185.

ⓐ $\frac{5}{6} \frac{5}{6}$ ⓑ $44$

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187.

ⓐ $\frac{25 n}{16} \frac{25 n}{16}$ ⓑ $\frac{25 n - 16}{30} \frac{25 n - 16}{30}$

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189.

ⓐ $\frac{−8 x - 15}{18} \frac{−8 x - 15}{18}$ ⓑ $- \frac{10 k}{27} - \frac{10 k}{27}$

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191.

ⓐ $\frac{−5 (a + 1)}{3} \frac{−5 (a + 1)}{3}$ ⓑ $a a$

Show solution

193.

$\frac{9}{7} \frac{9}{7}$

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195.

$−8 −8$

Show solution

197.

$\frac{11}{6} \frac{11}{6}$

Show solution

199.

$\frac{5}{2} \frac{5}{2}$

Show solution

201.

$5454$

Show solution

203.

$\frac{49}{25} \frac{49}{25}$

Show solution

205.

$\frac{15}{4} \frac{15}{4}$

Show solution

207.

$\frac{5}{21} \frac{5}{21}$

Show solution

209.

$\frac{5}{4} \frac{5}{4}$

Show solution

211.

$\frac{1}{24} \frac{1}{24}$

Show solution

213.

$\frac{−28 - 15 y}{60} \frac{−28 - 15 y}{60}$

Show solution

215.

$\frac{33}{64} \frac{33}{64}$

Show solution

217.

$\frac{7}{9} \frac{7}{9}$

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219.

$−5 −5$

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221.

$\frac{23}{24} \frac{23}{24}$

Show solution

223.

$\frac{11}{5} \frac{11}{5}$

Show solution

225.

$11$

Show solution

227.

$\frac{13}{3} \frac{13}{3}$

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229.

ⓐ $\frac{1}{5} \frac{1}{5}$ ⓑ $\frac{6}{5} \frac{6}{5}$

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231.

$- \frac{1}{9} - \frac{1}{9}$

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233.

$- \frac{5}{11} - \frac{5}{11}$

Show solution

235.

Answers will vary.

Show solution

237.

Answers will vary.

Section 1.4 Exercises

Show solution

239.

ⓐ 5.78 ⓑ 5.8 ⓒ 6

Show solution

241.

ⓐ 0.30 ⓑ 0.3 ⓒ 0

Show solution

243.

ⓐ 63.48 ⓑ 63.5 ⓒ 63

Show solution

245.

$−40.91 −40.91$

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247.

$−7.22 −7.22$

Show solution

249.

$−27.5 −27.5$

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251.

$02.212 02.212$

Show solution

253.

$51.31 51.31$

Show solution

255.

$−4.89 −4.89$

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257.

$−11.653 −11.653$

Show solution

259.

$337.8914 337.8914$

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261.

$1.305 1.305$

Show solution

263.

$92.4 92.4$

Show solution

265.

2.5

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267.

55200

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269.

$$ 2.44 $ 2.44$

Show solution

271.

$−4.8 −4.8$

Show solution

273.

$2.08 2.08$

Show solution

275.

$\frac{1}{25} \frac{1}{25}$

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277.

$\frac{19}{200} \frac{19}{200}$

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279.

$0.85 0.85$

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281.

$−12.4 −12.4$

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283.

$0.71 0.71$

Show solution

285.

$0.393 0.393$

Show solution

287.

$156 % 156 %$

Show solution

289.

$6.25 % 6.25 %$

Show solution

291.

Show solution

293.

Show solution

295.

$−10 −10$

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297.

ⓐ $0, \sqrt{36}, 9 0, \sqrt{36}, 9$ ⓑ $−8, 0, \sqrt{36}, 9 −8, 0, \sqrt{36}, 9$ ⓒ $−8, 0, \sqrt{36}, 9 −8, 0, \sqrt{36}, 9$ ⓓ $1.95286..., 1.95286...,$ ⓔ $−8, 0, 1.95286..., \frac{12}{5}, \sqrt{36}, 9 −8, 0, 1.95286..., \frac{12}{5}, \sqrt{36}, 9$

Show solution

299.

ⓐ none ⓑ $− \sqrt{100}, −7, −1 − \sqrt{100}, −7, −1$
ⓒ $− \sqrt{100}, −7, - \frac{8}{3}, −1, 0.77, 3 \frac{1}{4} − \sqrt{100}, −7, - \frac{8}{3}, −1, 0.77, 3 \frac{1}{4}$
ⓓ none
ⓔ $− \sqrt{100}, −7, - \frac{8}{3}, −1, 0.77, 3 \frac{1}{4} − \sqrt{100}, −7, - \frac{8}{3}, −1, 0.77, 3 \frac{1}{4}$

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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.

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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.

Show solution

305.

Show solution

307.

Show solution

309.

Answers will vary.

Show solution

311.

Answers will vary.

Section 1.5 Exercises

Show solution

313.

$27 m + (−21 n) 27 m + (−21 n)$

Show solution

315.

$\frac{5}{4} g + \frac{1}{2} h \frac{5}{4} g + \frac{1}{2} h$

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317.

$2.43 p + 8.26 q 2.43 p + 8.26 q$

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319.

$−63 −63$

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321.

$1 \frac{5}{6} 1 \frac{5}{6}$

Show solution

323.

$1717$

Show solution

325.

$14.88 14.88$

Show solution

327.

$10 p 10 p$

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329.

$4444$

Show solution

331.

$\frac{7}{8} \frac{7}{8}$

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333.

$d d$

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335.

$\frac{49}{11} \frac{49}{11}$

Show solution

337.

Show solution

339.

undefined

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341.

undefined

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343.

$32 y + 72 32 y + 72$

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345.

$6 c - 78 6 c - 78$

Show solution

347.

$\frac{3}{4} q + 3 \frac{3}{4} q + 3$

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349.

$5 y - 3 5 y - 3$

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351.

$3 + 8 r 3 + 8 r$

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353.

$36 d + 90 36 d + 90$

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355.

$r s - 18 r r s - 18 r$

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357.

$y p + 4 p y p + 4 p$

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359.

$−28 p - 7 −28 p - 7$

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361.

$−3 x + 18 −3 x + 18$

Show solution

363.

$−3 x + 7 −3 x + 7$

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365.

$−3 y - 8 −3 y - 8$

Show solution

367.

$−33 c + 26 −33 c + 26$

Show solution

369.

$− a + 19 − a + 19$

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371.

$4 m - 10 4 m - 10$

Show solution

373.

$72 x - 25 72 x - 25$

Show solution

375.

$22 n + 9 22 n + 9$

Show solution

377.

$6 c + 34 6 c + 34$

Show solution

379.

$12 y + 63 12 y + 63$

Show solution

381.

Answers will vary.

Show solution

383.

Answers will vary.

Review Exercises

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385.

Divisible by $2, 3, 5, 6 2, 3, 5, 6$

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387.

120

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389.

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391.

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393.

$6 x^{2} - x + 5 6 x^{2} - x + 5$

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395.

ⓐ $11 (y - 2) 11 (y - 2)$ ⓑ $11 y - 2 11 y - 2$

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397.

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399.

$−9 −9$

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401.

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403.

ⓐ 40 ⓑ 40

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405.

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407.

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409.

$−12 −12$

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411.

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413.

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

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415.

$46^{°} 46^{°}$

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417.

$- \frac{15 x^{3}}{11 y^{2}} - \frac{15 x^{3}}{11 y^{2}}$

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419.

$\frac{8 x}{15 y} \frac{8 x}{15 y}$

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421.

$\frac{31}{36} \frac{31}{36}$

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423.

ⓐ $\frac{11}{8} \frac{11}{8}$ ⓑ $\frac{5}{6} \frac{5}{6}$

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425.

$- \frac{1}{6} - \frac{1}{6}$

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427.

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429.

$- \frac{1}{5} - \frac{1}{5}$

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431.

$6.17 6.17$

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433.

$96.978 96.978$

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435.

488.1813

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437.

$56.3 56.3$

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439.

$−23 −23$

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441.

$−9.6 −9.6$

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443.

$1. \bar{27} 1. \bar{27}$

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445.

$4.75 % 4.75 %$

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447.

no real number

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449.

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

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451.

$\frac{3}{4} x + y \frac{3}{4} x + y$

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453.

$1 \frac{11}{15} 1 \frac{11}{15}$

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455.

$\frac{9}{17} \frac{9}{17}$

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457.

undefined

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459.

$8 b + 10 8 b + 10$

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461.

$x p - 5 p x p - 5 p$

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463.

$−6 x - 6 −6 x - 6$

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465.

$y + 16 y + 16$

Practice Test

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467.

$7 n + 7 7 n + 7$

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469.

$−8 - 11; - 19 −8 - 11; - 19$

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

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471.

ⓐ $28.15 28.15$ ⓑ $28.146 28.146$

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473.

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475.

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477.

$−8 −8$

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479.

$\frac{15}{17} \frac{15}{17}$

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481.

$- \frac{5}{3} - \frac{5}{3}$

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483.

$33$

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485.

$- \frac{7}{6} - \frac{7}{6}$

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487.

$−65.4 −65.4$

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489.

−160

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491.

$1 \frac{8}{13} 1 \frac{8}{13}$

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493.

ⓐ 0 ⓑ undefined

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495.

$13 y - 3 13 y - 3$