practice and homework 8.4

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Big Ideas Math Common Core 8th Grade, Grade: 8 Publisher: Holt McDougal; Student edition

Big ideas math common core 8th grade, title : big ideas math common core 8th grade, publisher : holt mcdougal; student edition, isbn : 1608402266, isbn-13 : 978-1608402267, use the table below to find videos, mobile apps, worksheets and lessons that supplement big ideas math common core 8th grade..

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practice and homework 8.4

Practice And Homework Lesson 8.4 Answer Key

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Embarking on a journey through Practice and Homework Lesson 8.4 Answer Key, we delve into a comprehensive guide that empowers students to master mathematical concepts and hone their problem-solving abilities. This invaluable resource provides step-by-step solutions, insightful explanations, and a wealth of practice exercises, ensuring a deep understanding of the subject matter.

Delving into the intricate details of mathematical concepts, this lesson unpacks key skills and strategies, fostering a solid foundation for mathematical success. By engaging with the content and utilizing the answer key, students can enhance their cognitive processes, develop critical thinking abilities, and cultivate a lifelong appreciation for the beauty and power of mathematics.

1. Practice and Homework Lesson 8.4 Answer Key Overview

Practice and Homework Lesson 8.4 Answer Key provides solutions and explanations for the practice and homework assignments in Lesson 8.4 of a mathematics curriculum. Completing these assignments is crucial for reinforcing mathematical concepts, developing problem-solving skills, and assessing student understanding.

2. Content Analysis of Practice and Homework Lesson 8.4 Answer Key

Lesson 8.4 covers the following concepts and skills:

  • Simplifying expressions with exponents
  • Multiplying and dividing expressions with exponents
  • Solving equations with exponents
  • Using scientific notation
  • Solving word problems involving exponents

3. Mathematical Concepts and Procedures

Simplifying Expressions with Exponents: Combining like terms with exponents, using the product rule and quotient rule for exponents.

Multiplying and Dividing Expressions with Exponents: Applying the product rule and quotient rule for exponents to multiply and divide expressions with exponents.

Solving Equations with Exponents: Isolating the variable with the exponent, using the inverse operations of exponents.

Using Scientific Notation: Converting numbers to and from scientific notation, performing operations with numbers in scientific notation.

Solving Word Problems Involving Exponents: Applying exponential concepts to solve real-world problems involving growth, decay, and other exponential relationships.

4. Problem-Solving Strategies

The lesson teaches the following problem-solving strategies:

  • Break down complex problems: Decompose problems into smaller, manageable steps.
  • Use properties of exponents: Apply the product rule, quotient rule, and power rule to simplify expressions.
  • Isolate the variable with the exponent: Solve equations by isolating the variable with the exponent on one side of the equation.
  • Use scientific notation: Convert numbers to and from scientific notation to make calculations easier.
  • Check solutions: Verify the reasonableness of solutions by substituting them back into the original problem.

5. Answer Key and Explanations: Practice And Homework Lesson 8.4 Answer Key

The answer key provides step-by-step solutions for each problem, explaining the reasoning and mathematical operations used to arrive at the answer.

Importance of Understanding the Process: Emphasizes that students should not just memorize answers but understand the process of solving problems.

6. Educational Value and Applications

Educational Value:

  • Reinforces understanding of exponential concepts and procedures.
  • Develops problem-solving skills and critical thinking.
  • Prepares students for higher-level mathematics courses.

Applications:

  • Incorporate into classroom instruction as practice and review.
  • Use as homework assignments to assess student understanding.
  • Provide as additional resources for students who need extra support.

What is the purpose of Practice and Homework Lesson 8.4 Answer Key?

Practice and Homework Lesson 8.4 Answer Key provides step-by-step solutions, insightful explanations, and a wealth of practice exercises to enhance student understanding of mathematical concepts and problem-solving strategies.

How can I use Practice and Homework Lesson 8.4 Answer Key effectively?

To maximize the benefits of Practice and Homework Lesson 8.4 Answer Key, engage with the content actively, attempt the practice exercises, and utilize the answer key to check your solutions and gain insights into the problem-solving process.

What are the key benefits of using Practice and Homework Lesson 8.4 Answer Key?

Practice and Homework Lesson 8.4 Answer Key empowers students to master mathematical concepts, hone their problem-solving skills, build confidence, and cultivate a lifelong appreciation for mathematics.

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  • Grade 4 Homework Practice FL.

practice and homework 8.4

Multiply.

\(3\times\frac{7}{10}=\)

practice and homework 8.4

Explanation:

practice and homework 8.4

\(5\times\frac{4}{8}=\)

\(4\times\frac{6}{12}=\)

\(2\times\frac{3}{4}=\)

\(6\times\frac{3}{5}\)

\(7\times\frac{2}{10}=\)

Multiply. Write the product as a mixed number.

\(4\times\frac{8}{10}=\)

\(3\times\frac{5}{6}=\)

\(2\times3\frac{1}{3}=\)

\(4\times2\frac{2}{5}=\)

\(5\times1\frac{7}{8}=\)

\(3\times3\frac{3}{4}=\)

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Be Prepared

ⓐ 8; ⓑ −1; ⓒ -729

ⓐ x 6 x 6 ; ⓑ y 6 y 6 ; ⓒ z 12 z 12

1 y 8 1 y 8

53 60 53 60

64 x 6 y 15 64 x 6 y 15

1 125 1 125

2 x 2 + 11 x − 8 2 x 2 + 11 x − 8

8 + 2 a − a 2 8 + 2 a − a 2

81 − 90 y + 25 y 2 81 − 90 y + 25 y 2

49 − 9 x 2 49 − 9 x 2

y 2 − 6 y + 9 y 2 − 6 y + 9

x = 5 2 x = 5 2

n = 2 or n = 4 n = 2 or n = 4

( − ∞ , 1 2 ] ( − ∞ , 1 2 ]

f ( 2 ) = 2 , f ( −1 ) = −7 , f ( 0 ) = −4 f ( 2 ) = 2 , f ( −1 ) = −7 , f ( 0 ) = −4

domain: [ 0 , ∞ ) ; range: [ 0 , ∞ ) domain: [ 0 , ∞ ) ; range: [ 0 , ∞ )

ⓐ −4 , 0. 5 – , 7 3 , 3 , 81 ; −4 , 0. 5 – , 7 3 , 3 , 81 ; ⓑ 7 ; 7 ; ⓒ −4 , − 7 , 0. 5 – , 7 3 , 3 , 81 −4 , − 7 , 0. 5 – , 7 3 , 3 , 81

2 x 2 − x − 15 2 x 2 − x − 15

5 + 15 2 5 + 15 2

ⓐ −8 −8 ⓑ 15

ⓐ 10 ⓑ −11 −11

ⓐ not a real number ⓑ −9 −9

ⓐ −7 −7 ⓑ not a real number

ⓐ 3 ⓑ 4 ⓒ 3

ⓐ 10 ⓑ 2 ⓒ 4

ⓐ −3 −3 ⓑ not real ⓒ −2 −2

ⓐ −6 −6 ⓑ not real ⓒ −4 −4

ⓐ 6 < 38 < 7 6 < 38 < 7 ⓑ 4 < 93 3 < 5 4 < 93 3 < 5

ⓐ 9 < 84 < 10 9 < 84 < 10 ⓑ 5 < 152 3 < 6 5 < 152 3 < 6

ⓐ ≈ 3.32 ≈ 3.32 ⓑ ≈ 4.14 ≈ 4.14 ⓒ ≈ 3.36 ≈ 3.36

ⓐ ≈ 3.61 ≈ 3.61 ⓑ ≈ 4.38 ≈ 4.38 ⓒ ≈ 3.15 ≈ 3.15

ⓐ | b | | b | ⓑ w ⓒ | m | | m | ⓓ q

ⓐ | y | | y | ⓑ p ⓒ | z | | z | ⓓ q

ⓐ | y 9 | | y 9 | ⓑ z 6 z 6

ⓐ m 2 m 2 ⓑ | b 5 | | b 5 |

ⓐ | u 3 | | u 3 | ⓑ v 5 v 5

ⓐ c 4 c 4 ⓑ d 4 d 4

ⓐ 8 | x | 8 | x | ⓑ −10 | p | −10 | p |

ⓐ 13 | y | 13 | y | ⓑ −11 | y | −11 | y |

ⓐ 3 x 9 3 x 9 ⓑ 3 | q 7 | 3 | q 7 |

ⓐ 5 q 3 5 q 3 ⓑ 3 q 5 3 q 5

ⓐ 10 | a b | 10 | a b | ⓑ 12 p 6 q 10 12 p 6 q 10 ⓒ 2 x 10 y 4 2 x 10 y 4

ⓐ 15 | m n | 15 | m n | ⓑ 13 | x 5 y 7 | 13 | x 5 y 7 | ⓒ 3 w 12 z 5 3 w 12 z 5

ⓐ 12 2 12 2 ⓑ 3 3 3 3 3 3 ⓒ 2 4 4 2 4 4

ⓐ 12 3 12 3 ⓑ 5 5 3 5 5 3 ⓒ 3 9 4 3 9 4

ⓐ b 2 b b 2 b ⓑ | y | y 2 4 | y | y 2 4 ⓒ z z 2 3 z z 2 3

ⓐ p 4 p p 4 p ⓑ y y 3 5 y y 3 5 ⓒ q 2 q 6 q 2 q 6

ⓐ 4 y 2 2 y 4 y 2 2 y ⓑ 3 p 3 2 p 3 3 p 3 2 p 3 ⓒ 2 q 2 4 q 2 4 2 q 2 4 q 2 4

ⓐ 5 a 4 3 a 5 a 4 3 a ⓑ 4 m 3 2 m 2 3 4 m 3 2 m 2 3 ⓒ 3 | n | 2 n 3 4 3 | n | 2 n 3 4

ⓐ 7 | a 3 | b 2 2 a b 7 | a 3 | b 2 2 a b ⓑ 2 x y 7 x 2 y 3 2 x y 7 x 2 y 3 ⓒ 2 | x | y 2 2 x 4 2 | x | y 2 2 x 4

ⓐ 6 m 4 | n 5 | 5 m n 6 m 4 | n 5 | 5 m n ⓑ 2 x 2 y 9 y 2 3 2 x 2 y 9 y 2 3 ⓒ 2 | x y | 5 x 3 4 2 | x y | 5 x 3 4

ⓐ −4 −4 ⓑ no real number no real number

ⓐ −5 5 3 −5 5 3 ⓑ no real number

ⓐ 5 + 5 3 5 + 5 3 ⓑ 2 − 3 2 − 3

ⓐ 2 + 7 2 2 + 7 2 ⓑ 2 − 5 2 − 5

ⓐ 5 4 5 4 ⓑ 3 5 3 5 ⓒ 2 3 2 3

ⓐ 7 9 7 9 ⓑ 2 5 2 5 ⓒ 1 3 1 3

ⓐ | a | | a | ⓑ | x | | x | ⓒ y 3 y 3

ⓐ x 2 x 2 ⓑ m 2 m 2 ⓒ n 2 n 2

2 | p | 6 p 7 2 | p | 6 p 7

2 x 2 3 x 5 2 x 2 3 x 5

ⓐ 4 | m | 5 m | n 3 | 4 | m | 5 m | n 3 | ⓑ 3 c 3 4 c 3 d 2 3 c 3 4 c 3 d 2 ⓒ 2 x 2 5 x 2 4 | y | 2 x 2 5 x 2 4 | y |

ⓐ 3 u 3 6 u v 4 3 u 3 6 u v 4 ⓑ 2 r 5 3 s 2 2 r 5 3 s 2 ⓒ 3 | m 3 | 2 m 2 4 | n 3 | 3 | m 3 | 2 m 2 4 | n 3 |

ⓐ 5 | y | x 6 5 | y | x 6 ⓑ 2 x y y 2 3 3 2 x y y 2 3 3 ⓒ | a b | a 4 2 | a b | a 4 2

ⓐ 2 | m | 3 5 | n 3 | 2 | m | 3 5 | n 3 | ⓑ 3 x y x 2 3 5 3 x y x 2 3 5 ⓒ 2 | a b | a 2 4 3 2 | a b | a 2 4 3

ⓐ 7 z 2 7 z 2 ⓑ −5 2 3 −5 2 3 ⓒ 3 | m | 2 m 2 4 3 | m | 2 m 2 4

ⓐ 8 m 4 8 m 4 ⓑ −4 −4 ⓒ 3 | n | 2 4 3 | n | 2 4

ⓐ t t ⓑ m 3 m 3 ⓒ r 4 r 4

ⓐ b 6 b 6 ⓑ z 5 z 5 ⓒ p 4 p 4

ⓐ ( 10 m ) 1 2 ( 10 m ) 1 2 ⓑ ( 3 n ) 1 5 ( 3 n ) 1 5 ⓒ 3 ( 6 y ) 1 4 3 ( 6 y ) 1 4

ⓐ ( 3 k ) 1 7 ( 3 k ) 1 7 ⓑ ( 5 j ) 1 4 ( 5 j ) 1 4 ⓒ 8 ( 2 a ) 1 3 8 ( 2 a ) 1 3

ⓐ 6 ⓑ 2 ⓒ 2

ⓐ 10 ⓑ 3 ⓒ 3

ⓐ No real solution ⓑ −8 −8 ⓒ 1 8 1 8

ⓐ No real solution ⓑ −4 −4 ⓒ 1 4 1 4

ⓐ x 5 2 x 5 2 ⓑ ( 3 y ) 3 4 ( 3 y ) 3 4 ⓒ ( 2 m 3 n ) 5 2 ( 2 m 3 n ) 5 2

ⓐ a 2 5 a 2 5 ⓑ ( 5 a b ) 5 3 ( 5 a b ) 5 3 ⓒ ( 7 x y z ) 3 2 ( 7 x y z ) 3 2

ⓐ 9 ⓑ 1 729 1 729 ⓒ 1 8 1 8

ⓐ 8 ⓑ 1 9 1 9 ⓒ 1 125 1 125

ⓐ −64 −64 ⓑ − 1 64 − 1 64 ⓒ not a real number

ⓐ −729 −729 ⓑ − 1 729 − 1 729 ⓒ not a real number

ⓐ x 3 2 x 3 2 ⓑ x 8 x 8 ⓒ 1 x 1 x

ⓐ y 11 8 y 11 8 ⓑ m 2 m 2 ⓒ 1 d 1 d

ⓐ 8 x 1 5 8 x 1 5 ⓑ x 1 2 y 1 3 x 1 2 y 1 3

ⓐ 729 n 3 5 729 n 3 5 ⓑ a 2 b 2 3 a 2 b 2 3

ⓐ m 2 m 2 ⓑ 5 n m 1 4 5 n m 1 4

ⓐ u 3 u 3 ⓑ 3 x 1 5 y 1 3 3 x 1 5 y 1 3

ⓐ − 2 − 2 ⓑ 11 x 3 11 x 3 ⓒ 3 x 4 − 5 y 4 3 x 4 − 5 y 4

ⓐ −4 3 −4 3 ⓑ 8 y 3 8 y 3 ⓒ 5 m 4 − 2 m 3 5 m 4 − 2 m 3

ⓐ −2 7 x −2 7 x ⓑ − 5 x y 4 − 5 x y 4

ⓐ − 3 y − 3 y ⓑ 3 7 m n 3 3 7 m n 3

ⓐ 9 2 9 2 ⓑ 2 2 3 2 2 3 ⓒ 3 3 3 3

ⓐ 7 3 7 3 ⓑ −10 5 3 −10 5 3 ⓒ −3 2 3 −3 2 3

ⓐ − m 3 2 m − m 3 2 m ⓑ x 2 5 x 3 x 2 5 x 3

ⓐ − p 3 p − p 3 p ⓑ 4 y 4 y 2 3 − 2 y 4 n 2 3 4 y 4 y 2 3 − 2 y 4 n 2 3

ⓐ 12 15 12 15 ⓑ −18 4 3 −18 4 3

ⓐ 27 2 27 2 ⓑ −36 2 3 −36 2 3

ⓐ 288 x 3 5 288 x 3 5 ⓑ 8 y 6 y 2 4 8 y 6 y 2 4

ⓐ 144 y 2 5 y 144 y 2 5 y ⓑ −36 a 3 a 4 −36 a 3 a 4

ⓐ 18 + 6 18 + 6 ⓑ −2 4 3 − 2 3 3 −2 4 3 − 2 3 3

ⓐ −40 + 4 2 −40 + 4 2 ⓑ −3 − 18 3 −3 − 18 3

ⓐ −66 + 15 7 −66 + 15 7 ⓑ x 2 3 − 5 x 3 + 6 x 2 3 − 5 x 3 + 6

ⓐ 41 − 14 11 41 − 14 11 ⓑ x 2 3 + 4 x 3 + 3 x 2 3 + 4 x 3 + 3

1 + 9 21 1 + 9 21

−12 − 20 3 −12 − 20 3

ⓐ 102 + 20 2 102 + 20 2 ⓑ 55 + 6 6 55 + 6 6

ⓐ 41 − 12 5 41 − 12 5 ⓑ 121 − 36 10 121 − 36 10

ⓐ 5 s 8 5 s 8 ⓑ 2 a 2 a

ⓐ 5 q 2 6 5 q 2 6 ⓑ 2 b 2 b

ⓐ 9 x 2 y 2 9 x 2 y 2 ⓑ −4 x y −4 x y

ⓐ 10 n 3 m 10 n 3 m ⓑ −3 p q 2 −3 p q 2

4 x y 2 x 4 x y 2 x

4 a b 3 b 4 a b 3 b

ⓐ 5 3 3 5 3 3 ⓑ 6 8 6 8 ⓒ 2 x x 2 x x

ⓐ 6 5 5 6 5 5 ⓑ 14 6 14 6 ⓒ 5 x x 5 x x

ⓐ 49 3 7 49 3 7 ⓑ 90 3 6 90 3 6 ⓒ 5 3 y 2 3 3 y 5 3 y 2 3 3 y

ⓐ 4 3 2 4 3 2 ⓑ 150 3 10 150 3 10 ⓒ 2 5 n 2 3 5 n 2 5 n 2 3 5 n

ⓐ 27 4 3 27 4 3 ⓑ 12 4 4 12 4 4 ⓒ 3 5 x 3 4 5 x 3 5 x 3 4 5 x

ⓐ 125 4 5 125 4 5 ⓑ 14 4 4 14 4 4 ⓒ 2 4 x 3 4 x 2 4 x 3 4 x

− 3 ( 1 + 5 ) 4 − 3 ( 1 + 5 ) 4

4 + 6 5 4 + 6 5

5 ( x − 2 ) x − 2 5 ( x − 2 ) x − 2

10 ( y + 3 ) y − 3 10 ( y + 3 ) y − 3

( p + 2 ) p − 2 2 ( p + 2 ) p − 2 2

( q − 10 ) q − 10 2 ( q − 10 ) q − 10 2

m = 23 3 m = 23 3

z = 3 10 z = 3 10

no solution no solution

x = 2 , x = 3 x = 2 , x = 3

y = 5 , y = 6 y = 5 , y = 6

x = −6 x = −6

x = −9 x = −9

x = 8 x = 8

x = 6 x = 6

m = 7 m = 7

n = 3 n = 3

a = 63 a = 63

b = 311 b = 311

x = 3 x = 3

x = − 6 5 x = − 6 5

x = 4 x = 4

x = 9 x = 9

x = 5 x = 5

x = 0 x = 4 x = 0 x = 4

3.5 3.5 seconds

42.7 42.7 feet

54.1 54.1 feet

ⓐ f ( 6 ) = 4 f ( 6 ) = 4 ⓑ no value at x = 0 x = 0

ⓐ g ( 4 ) = 5 g ( 4 ) = 5 ⓑ no value at f ( −3 ) f ( −3 )

ⓐ g ( 4 ) = 2 g ( 4 ) = 2 ⓑ g ( 1 ) = −1 g ( 1 ) = −1

ⓐ h ( 2 ) = 2 h ( 2 ) = 2 ⓑ h ( −5 ) = −3 h ( −5 ) = −3

ⓐ f ( 4 ) = 2 f ( 4 ) = 2 ⓑ f ( −1 ) = 1 f ( −1 ) = 1

ⓐ g ( 16 ) = 3 g ( 16 ) = 3 ⓑ g ( 3 ) = 2 g ( 3 ) = 2

[ 5 6 , ∞ ) [ 5 6 , ∞ )

( − ∞ , 4 5 ] ( − ∞ , 4 5 ]

( −3 , ∞ ) ( −3 , ∞ )

( 5 , ∞ ) ( 5 , ∞ )

( − ∞ , ∞ ) ( − ∞ , ∞ )

ⓐ domain: [ −2 , ∞ ) [ −2 , ∞ ) ⓑ

ⓒ range: [ 0 , ∞ ) [ 0 , ∞ )

ⓐ domain: [ 2 , ∞ ) [ 2 , ∞ ) ⓑ

ⓐ domain: ( − ∞ , ∞ ) ( − ∞ , ∞ ) ⓑ

ⓒ range: ( − ∞ , ∞ ) ( − ∞ , ∞ )

ⓐ 9 i 9 i ⓑ 5 i 5 i ⓒ 3 2 i 3 2 i

ⓐ 6 i 6 i ⓑ 3 i 3 i ⓒ 3 3 i 3 3 i

6 2 i 6 2 i

7 3 i 7 3 i

ⓐ 6 + 5 i 6 + 5 i ⓑ 6 − 3 i 6 − 3 i

ⓐ −2 − 6 i −2 − 6 i ⓑ 2 + 9 i 2 + 9 i

12 + 20 i 12 + 20 i

12 − 6 i 12 − 6 i

−11 − 7 i −11 − 7 i

−5 − 10 i −5 − 10 i

−21 + 21 i −21 + 21 i

9 − 40 i 9 − 40 i

−12 − 22 3 i −12 − 22 3 i

6 + 12 2 i 6 + 12 2 i

4 17 + 16 17 i 4 17 + 16 17 i

2 5 + 4 5 i 2 5 + 4 5 i

3 2 − 3 2 i 3 2 − 3 2 i

4 5 − 2 5 i 4 5 − 2 5 i

Section 8.1 Exercises

ⓐ 8 ⓑ −9 −9

ⓐ 14 ⓑ −1 −1

ⓐ 2 3 2 3 ⓑ −0.1 −0.1

ⓐ not real number ⓑ −17 −17

ⓐ −15 −15 ⓑ not real number

ⓐ 8 ⓑ 3 ⓒ 1

ⓐ −2 −2 ⓑ not real not real ⓒ −2 −2

ⓐ −5 −5 ⓑ not real not real ⓒ −4 −4

ⓐ 8 < 70 < 9 8 < 70 < 9 ⓑ 4 < 71 3 < 5 4 < 71 3 < 5

ⓐ 14 < 200 < 15 14 < 200 < 15 ⓑ 5 < 137 3 < 6 5 < 137 3 < 6

ⓐ ≈ 4.36 ≈ 4.36 ⓑ ≈ 4.46 ≈ 4.46 ⓒ ≈ 3.14 ≈ 3.14

ⓐ ≈ 7.28 ≈ 7.28 ⓑ ≈ 5.28 ≈ 5.28 ⓒ ≈ 4.61 ≈ 4.61

ⓐ u ⓑ | v | | v |

ⓐ | y | | y | ⓑ m m

ⓐ | x 3 | | x 3 | ⓑ y 8 y 8

ⓐ x 12 x 12 ⓑ | y 11 | | y 11 |

ⓐ x 3 x 3 ⓑ | y 3 | | y 3 |

ⓐ m 2 m 2 ⓑ n 4 n 4

ⓐ 7 | x | 7 | x | ⓑ −9 | x 9 | −9 | x 9 |

ⓐ 11 m 10 11 m 10 ⓑ −8 | a | −8 | a |

ⓐ 2 x 2 2 x 2 ⓑ 2 y 2 2 y 2

ⓐ 6 a 2 6 a 2 ⓑ 2 b 4 2 b 4

ⓐ 12 | x y | 12 | x y | ⓑ 13 w 4 | y 5 | 13 w 4 | y 5 | ⓒ 2 a 17 b 2 2 a 17 b 2

ⓐ 11 | a b | 11 | a b | ⓑ 3 c 4 d 6 3 c 4 d 6 ⓒ 4 x 5 y 22 4 x 5 y 22

Answers will vary.

Section 8.2 Exercises

ⓐ 2 2 4 2 2 4 ⓑ 2 2 5 2 2 5

ⓐ 2 4 4 2 4 4 ⓑ 4 4 3 4 4 3

ⓐ | y 5 | y | y 5 | y ⓑ r r 2 3 r r 2 3 ⓒ s 2 s 2 4 s 2 s 2 4

ⓐ n 10 n n 10 n ⓑ q 2 q 2 3 q 2 q 2 3 ⓒ | n | n 2 8 | n | n 2 8

ⓐ 5 r 6 5 r 5 r 6 5 r ⓑ 3 x 4 x 2 3 3 x 4 x 2 3 ⓒ 2 | y | 3 y 2 4 2 | y | 3 y 2 4

ⓐ 11 | m 11 | 2 m 11 | m 11 | 2 m ⓑ 3 m 2 5 m 2 4 3 m 2 5 m 2 4 ⓒ 2 n 5 n 3 5 2 n 5 n 3 5

ⓐ 7 | m 3 n 5 | 3 m n 7 | m 3 n 5 | 3 m n ⓑ 2 x 2 y 2 6 y 3 2 x 2 y 2 6 y 3 ⓒ 2 | x y | 2 x 4 2 | x y | 2 x 4

ⓐ 8 | q r 3 | 3 q r 8 | q r 3 | 3 q r ⓑ 3 m 3 n 3 2 n 3 3 m 3 n 3 2 n 3 ⓒ 3 a 2 b 2 a 4 3 a 2 b 2 a 4

ⓐ −6 4 3 −6 4 3 ⓑ not real

ⓐ −2 −2 ⓑ not real

ⓐ 5 + 2 3 5 + 2 3 ⓑ 5 − 6 5 − 6

ⓐ 1 + 3 5 1 + 3 5 ⓑ 1 + 10 1 + 10

ⓐ 3 4 3 4 ⓑ 2 3 2 3 ⓒ 1 3 1 3

ⓐ 5 3 5 3 ⓑ 3 5 3 5 ⓒ 1 4 1 4

ⓐ x 2 x 2 ⓑ p 3 p 3 ⓒ | q | | q |

ⓐ 1 y 2 1 y 2 ⓑ u 2 u 2 ⓒ | v 3 | | v 3 |

4 | x 3 | 6 x 11 4 | x 3 | 6 x 11

5 m 2 3 m 4 5 m 2 3 m 4

7 r 2 2 r 10 7 r 2 2 r 10

2 | q 3 | 7 15 2 | q 3 | 7 15

ⓐ 5 r 4 3 r s 4 5 r 4 3 r s 4 ⓑ 3 a 2 2 a 2 3 b 3 a 2 2 a 2 3 b ⓒ 2 | c | 4 c 4 | d | 2 | c | 4 c 4 | d |

ⓐ 2 | p 3 | 7 p | q | 2 | p 3 | 7 p | q | ⓑ 3 s 2 3 s 2 3 t 3 s 2 3 s 2 3 t ⓒ 2 | p 3 | 4 p 3 4 | q 3 | 2 | p 3 | 4 p 3 4 | q 3 |

ⓐ 4 | x y | 3 4 | x y | 3 ⓑ y 2 x 3 2 y 2 x 3 2 ⓒ | a b | a 4 2 | a b | a 4 2

ⓐ 1 2 | p q | 1 2 | p q | ⓑ 2 c d d 2 3 5 2 c d d 2 3 5 ⓒ | m n | 2 | m n | 2

ⓐ 3 p 4 p | q | 3 p 4 p | q | ⓑ 2 2 4 2 2 4 ⓒ 2 x 2 x 5 2 x 2 x 5

ⓐ 5 | m 3 | 5 | m 3 | ⓑ 5 5 3 5 5 3 ⓒ 3 | y | 3 y 2 4 3 | y | 3 y 2 4

Section 8.3 Exercises

ⓐ x x ⓑ y 3 y 3 ⓒ z 4 z 4

ⓐ u 5 u 5 ⓑ v 9 v 9 ⓒ w 20 w 20

ⓐ x 1 7 x 1 7 ⓑ y 1 9 y 1 9 ⓒ f 1 5 f 1 5

ⓐ ( 7 c ) 1 3 ( 7 c ) 1 3 ⓑ ( 12 d ) 1 7 ( 12 d ) 1 7 ⓒ 2 ( 6 b ) 1 4 2 ( 6 b ) 1 4

ⓐ ( 21 p ) 1 2 ( 21 p ) 1 2 ⓑ ( 8 q ) 1 4 ( 8 q ) 1 4 ⓒ 4 ( 36 r ) 1 6 4 ( 36 r ) 1 6

ⓐ 9 ⓑ 5 ⓒ 8

ⓐ 2 ⓑ 4 ⓒ 5

ⓐ −6 −6 ⓑ −6 −6 ⓒ 1 6 1 6

ⓐ not real ⓑ −3 −3 ⓒ 1 3 1 3

ⓐ not real ⓑ −6 −6 ⓒ 1 6 1 6

ⓐ not real ⓑ −10 −10 ⓒ 1 10 1 10

ⓐ m 5 2 m 5 2 ⓑ ( 3 y ) 7 3 ( 3 y ) 7 3 ⓒ ( 4 x 5 y ) 3 5 ( 4 x 5 y ) 3 5

ⓐ u 2 5 u 2 5 ⓑ ( 6 x ) 5 3 ( 6 x ) 5 3 ⓒ ( 18 a 5 b ) 7 4 ( 18 a 5 b ) 7 4

ⓐ 32,768 ⓑ 1 729 1 729 ⓒ 9

ⓐ 4 ⓑ 1 9 1 9 ⓒ not real

ⓐ −27 −27 ⓑ − 1 27 − 1 27 ⓒ not real

ⓐ c 7 8 c 7 8 ⓑ p 9 p 9 ⓒ 1 r 1 r

ⓐ y 5 4 y 5 4 ⓑ x 8 x 8 ⓒ 1 m 1 m

ⓐ 81 q 2 81 q 2 ⓑ a 1 2 b a 1 2 b

ⓐ 8 u 1 4 8 u 1 4 ⓑ 8 p 1 2 q 3 4 8 p 1 2 q 3 4

ⓐ r 7 2 r 7 2 ⓑ 6 s t 6 s t

ⓐ c 2 c 2 ⓑ 2 x 3 y 2 x 3 y

Section 8.4 Exercises

ⓐ 3 2 3 2 ⓑ 7 m 3 7 m 3 ⓒ 6 m 4 6 m 4

ⓐ 9 5 9 5 ⓑ 12 a 3 12 a 3 ⓒ 6 2 z 4 6 2 z 4

ⓐ 4 2 a 4 2 a ⓑ 0

ⓐ 3 c 3 c ⓑ 4 p q 3 4 p q 3

ⓐ −2 3 −2 3 ⓑ −2 5 3 −2 5 3 ⓒ 3 2 4 3 2 4

ⓐ 7 3 7 3 ⓑ 7 2 3 7 2 3 ⓒ 3 5 4 3 5 4

ⓐ a 2 2 a a 2 2 a ⓑ 0

ⓐ 2 c 3 5 c 2 c 3 5 c ⓑ 14 r 2 2 r 2 4 14 r 2 2 r 2 4

4 y 2 4 y 2

ⓐ −18 6 −18 6 ⓑ −64 9 3 −64 9 3

ⓐ −30 2 −30 2 ⓑ 6 2 4 6 2 4

ⓐ 72 z 2 3 72 z 2 3 ⓑ 45 x 2 2 3 45 x 2 2 3

ⓐ −42 z 5 2 z −42 z 5 2 z ⓑ −8 y 6 y 4 −8 y 6 y 4

ⓐ 14 + 5 7 14 + 5 7 ⓑ 4 6 3 + 3 4 3 4 6 3 + 3 4 3

ⓐ 44 − 3 11 44 − 3 11 ⓑ 3 2 4 + 54 4 3 2 4 + 54 4

60 + 2 3 60 + 2 3

ⓐ 30 + 18 2 30 + 18 2 ⓑ x 2 3 − 2 x 3 − 3 x 2 3 − 2 x 3 − 3

ⓐ −55 + 13 10 −55 + 13 10 ⓑ 2 x 2 3 + 8 x 3 + 6 2 x 2 3 + 8 x 3 + 6

23 + 3 30 23 + 3 30

−439 − 2 77 −439 − 2 77

ⓐ 14 + 6 5 14 + 6 5 ⓑ 79 − 20 3 79 − 20 3

ⓐ 87 − 18 6 87 − 18 6 ⓑ 163 + 60 7 163 + 60 7

9 x 2 3 − 4 9 x 2 3 − 4

− 5 4 − 5 4

10 c 2 3 − 9 c 3 3 10 c 2 3 − 9 c 3 3

17 q 2 17 q 2

−42 9 3 −42 9 3

29 − 7 17 29 − 7 17

54 − 36 2 54 − 36 2

6 + 3 2 3 6 + 3 2 3

Section 8.5 Exercises

ⓐ 4 3 4 3 ⓑ 4 3 4 3

ⓐ 10 m 2 7 10 m 2 7 ⓑ 3 y 3 y

ⓐ 5 6 r 2 5 6 r 2 ⓑ 2 x 3 2 x 3

ⓐ 6 p q 2 6 p q 2 ⓑ − 2 a 2 b − 2 a 2 b

ⓐ 8 m 4 3 n 4 8 m 4 3 n 4 ⓑ − 2 x 2 3 y 2 − 2 x 2 3 y 2

2 x 2 7 y 2 x 2 7 y

2 a b 2 a 3 2 a b 2 a 3

ⓐ 5 6 3 5 6 3 ⓑ 2 3 9 2 3 9 ⓒ 2 5 x x 2 5 x x

ⓐ 6 7 7 6 7 7 ⓑ 2 10 15 2 10 15 ⓒ 4 3 p p 4 3 p p

ⓐ 25 3 5 25 3 5 ⓑ 45 3 6 45 3 6 ⓒ 2 6 a 2 3 3 a 2 6 a 2 3 3 a

ⓐ 121 3 11 121 3 11 ⓑ 28 3 6 28 3 6 ⓒ 9 x 3 x 9 x 3 x

ⓐ 343 4 7 343 4 7 ⓑ 40 4 4 40 4 4 ⓒ 2 4 x 2 4 x 2 4 x 2 4 x

ⓐ 9 4 3 9 4 3 ⓑ 50 4 4 50 4 4 ⓒ 2 3 a 3 4 a 2 3 a 3 4 a

−2 ( 1 + 5 ) −2 ( 1 + 5 )

3 ( 3 + 7 ) 3 ( 3 + 7 )

3 ( m + 5 ) m − 5 3 ( m + 5 ) m − 5

2 ( x + 6 ) x − 6 2 ( x + 6 ) x − 6

( r + 5 ) r − 5 2 ( r + 5 ) r − 5 2

( x + 2 2 ) x − 8 2 ( x + 2 2 ) x − 8 2

Section 8.6 Exercises

x = 14 x = 14

no solution

x = −4 x = −4

m = 14 m = 14

v = 17 v = 17

m = 7 2 m = 7 2

u = 3 , u = 4 u = 3 , u = 4

r = 1 , r = 2 r = 1 , r = 2

x = 10 x = 10

x = −8 x = −8

x = 7 x = 7

z = 21 z = 21

x = 42 x = 42

r = 3 r = 3

u = 3 u = 3

r = −2 r = −2

x = 1 x = 1

x = −8 , x = 2 x = −8 , x = 2

a = 0 a = 0

u = 9 4 u = 9 4

a = 4 a = 4

x = 1 x = 5 x = 1 x = 5

8.7 8.7 feet

4.7 4.7 seconds

Section 8.7 Exercises

ⓐ f ( 5 ) = 4 f ( 5 ) = 4 ⓑ no value at x = 0 x = 0

ⓐ g ( 4 ) = 5 g ( 4 ) = 5 ⓑ g ( 8 ) = 7 g ( 8 ) = 7

ⓐ F ( 1 ) = 1 F ( 1 ) = 1 ⓑ F ( −11 ) = 5 F ( −11 ) = 5

ⓐ G ( 5 ) = 2 6 G ( 5 ) = 2 6 ⓑ G ( 2 ) = 3 G ( 2 ) = 3

ⓐ g ( 6 ) = 2 g ( 6 ) = 2 ⓑ g ( −2 ) = −2 g ( −2 ) = −2

ⓐ h ( −2 ) = 0 h ( −2 ) = 0 ⓑ h ( 6 ) = 2 4 3 h ( 6 ) = 2 4 3

ⓐ f ( 0 ) = 0 f ( 0 ) = 0 ⓑ f ( 2 ) = 2 f ( 2 ) = 2

ⓐ g ( 1 ) = 0 g ( 1 ) = 0 ⓑ g ( −3 ) = 2 g ( −3 ) = 2

[ 1 3 , ∞ ) [ 1 3 , ∞ )

( − ∞ , 2 3 ] ( − ∞ , 2 3 ]

( 2 , ∞ ) ( 2 , ∞ )

( − ∞ , −3 ] ∪ ( 2 , ∞ ) ( − ∞ , −3 ] ∪ ( 2 , ∞ )

[ − 3 8 , ∞ ) [ − 3 8 , ∞ )

ⓐ domain: [ −1 , ∞ ) [ −1 , ∞ ) ⓑ

ⓒ [ 0 , ∞ ) [ 0 , ∞ )

ⓐ domain: [ −4 , ∞ ) [ −4 , ∞ ) ⓑ

ⓐ domain: [ 0 , ∞ ) [ 0 , ∞ ) ⓑ

ⓒ [ 2 , ∞ ) [ 2 , ∞ )

ⓐ domain: ( − ∞ , 3 ] ( − ∞ , 3 ] ⓑ

ⓒ ( − ∞ , 0 ] ( − ∞ , 0 ]

ⓒ ( − ∞ , ∞ ) ( − ∞ , ∞ )

Section 8.8 Exercises

ⓐ 4 i 4 i ⓑ 11 i 11 i ⓒ 2 2 i 2 2 i

ⓐ 10 i 10 i ⓑ 13 i 13 i ⓒ 3 5 i 3 5 i

9 3 i 9 3 i

8 2 i 8 2 i

8 + 7 i 8 + 7 i

14 + 2 i 14 + 2 i

−2 + 2 i −2 + 2 i

8 + 5 i 8 + 5 i

7 − 13 i 7 − 13 i

25 − 2 2 i 25 − 2 2 i

−12 + 18 i −12 + 18 i

−38 + + 9 i −38 + + 9 i

27 + 15 i 27 + 15 i

−7 + 24 i −7 + 24 i

−5 + 12 i −5 + 12 i

−44 − 4 i 3 −44 − 4 i 3

−20 − 2 2 i −20 − 2 2 i

2 25 + 11 25 i 2 25 + 11 25 i

6 13 + 9 13 i 6 13 + 9 13 i

− 12 13 − 8 13 i − 12 13 − 8 13 i

4 3 − 1 3 i 4 3 − 1 3 i

− 3 4 + 1 2 i − 3 4 + 1 2 i

Review Exercises

ⓐ 15 ⓑ −4 −4

ⓐ 2 ⓑ 3 ⓒ 3

ⓐ 8 < 68 < 9 8 < 68 < 9 ⓑ 4 < 84 3 < 5 4 < 84 3 < 5

ⓐ 5 5 3 5 5 3 ⓑ 2 2 6 2 2 6

ⓐ 4 | s 7 | 5 s 4 | s 7 | 5 s ⓑ 2 a 3 a 2 5 2 a 3 a 2 5 ⓒ 2 | b | 2 b 6 2 | b | 2 b 6

ⓐ 6 7 6 7 ⓑ 2 3 2 3 ⓒ 1 2 1 2

ⓐ 1 2 | p q | 1 2 | p q | ⓑ 2 c d 5 d 2 3 2 c d 5 d 2 3 ⓒ | m n | 2 | m n | 2

ⓐ r r ⓑ s 3 s 3 ⓒ t 4 t 4

ⓐ 5 ⓑ 3 ⓒ 2

ⓐ −2 −2 ⓑ 1 3 1 3 ⓒ −5 −5

ⓐ 125 ⓑ 1 27 1 27 ⓒ 16

ⓐ 6 3 6 3 ⓑ b 9 b 9 ⓒ 1 w 1 w

ⓐ 4 2 4 2 ⓑ 9 p 3 9 p 3 ⓒ 2 x 3 2 x 3

37 y 3 37 y 3

ⓐ 126 x 2 x 126 x 2 x ⓑ 48 a 5 a 2 3 48 a 5 a 2 3

ⓐ 71 − 22 7 71 − 22 7 ⓑ x 2 3 − 8 x 3 + 15 x 2 3 − 8 x 3 + 15

ⓐ 27 + 8 11 27 + 8 11 ⓑ 29 − 12 5 29 − 12 5

− 7 ( 2 + 6 ) 2 − 7 ( 2 + 6 ) 2

64.8 64.8 feet

− ∞ , 10 7 − ∞ , 10 7

23 + 14 i 23 + 14 i

Practice Test

5 x 3 5 x 3

2 x 2 y 9 x 2 y 3 2 x 2 y 9 x 2 y 3

ⓐ 1 4 1 4 ⓑ −343 −343

x 7 4 x 7 4

− x 2 3 x − x 2 3 x

36 x 4 2 36 x 4 2

2 − 7 3 2 − 7 3

7 x 2 x 3 | y 3 | y 7 x 2 x 3 | y 3 | y

3 ( 2 − 3 ) 3 ( 2 − 3 )

−12 + 8 i −12 + 8 i

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  • Publisher/website: OpenStax
  • Book title: Intermediate Algebra 2e
  • Publication date: May 6, 2020
  • Location: Houston, Texas
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  • Section URL: https://openstax.org/books/intermediate-algebra-2e/pages/chapter-8

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