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College Algebra 2e

Practice Test

College Algebra 2ePractice Test
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Table of contents
  1. Preface
  2. 1 Prerequisites
    1. Introduction to Prerequisites
    2. 1.1 Real Numbers: Algebra Essentials
    3. 1.2 Exponents and Scientific Notation
    4. 1.3 Radicals and Rational Exponents
    5. 1.4 Polynomials
    6. 1.5 Factoring Polynomials
    7. 1.6 Rational Expressions
    8. Chapter Review
      1. Key Terms
      2. Key Equations
      3. Key Concepts
    9. Exercises
      1. Review Exercises
      2. Practice Test
  3. 2 Equations and Inequalities
    1. Introduction to Equations and Inequalities
    2. 2.1 The Rectangular Coordinate Systems and Graphs
    3. 2.2 Linear Equations in One Variable
    4. 2.3 Models and Applications
    5. 2.4 Complex Numbers
    6. 2.5 Quadratic Equations
    7. 2.6 Other Types of Equations
    8. 2.7 Linear Inequalities and Absolute Value Inequalities
    9. Chapter Review
      1. Key Terms
      2. Key Equations
      3. Key Concepts
    10. Exercises
      1. Review Exercises
      2. Practice Test
  4. 3 Functions
    1. Introduction to Functions
    2. 3.1 Functions and Function Notation
    3. 3.2 Domain and Range
    4. 3.3 Rates of Change and Behavior of Graphs
    5. 3.4 Composition of Functions
    6. 3.5 Transformation of Functions
    7. 3.6 Absolute Value Functions
    8. 3.7 Inverse Functions
    9. Chapter Review
      1. Key Terms
      2. Key Equations
      3. Key Concepts
    10. Exercises
      1. Review Exercises
      2. Practice Test
  5. 4 Linear Functions
    1. Introduction to Linear Functions
    2. 4.1 Linear Functions
    3. 4.2 Modeling with Linear Functions
    4. 4.3 Fitting Linear Models to Data
    5. Chapter Review
      1. Key Terms
      2. Key Concepts
    6. Exercises
      1. Review Exercises
      2. Practice Test
  6. 5 Polynomial and Rational Functions
    1. Introduction to Polynomial and Rational Functions
    2. 5.1 Quadratic Functions
    3. 5.2 Power Functions and Polynomial Functions
    4. 5.3 Graphs of Polynomial Functions
    5. 5.4 Dividing Polynomials
    6. 5.5 Zeros of Polynomial Functions
    7. 5.6 Rational Functions
    8. 5.7 Inverses and Radical Functions
    9. 5.8 Modeling Using Variation
    10. Chapter Review
      1. Key Terms
      2. Key Equations
      3. Key Concepts
    11. Exercises
      1. Review Exercises
      2. Practice Test
  7. 6 Exponential and Logarithmic Functions
    1. Introduction to Exponential and Logarithmic Functions
    2. 6.1 Exponential Functions
    3. 6.2 Graphs of Exponential Functions
    4. 6.3 Logarithmic Functions
    5. 6.4 Graphs of Logarithmic Functions
    6. 6.5 Logarithmic Properties
    7. 6.6 Exponential and Logarithmic Equations
    8. 6.7 Exponential and Logarithmic Models
    9. 6.8 Fitting Exponential Models to Data
    10. Chapter Review
      1. Key Terms
      2. Key Equations
      3. Key Concepts
    11. Exercises
      1. Review Exercises
      2. Practice Test
  8. 7 Systems of Equations and Inequalities
    1. Introduction to Systems of Equations and Inequalities
    2. 7.1 Systems of Linear Equations: Two Variables
    3. 7.2 Systems of Linear Equations: Three Variables
    4. 7.3 Systems of Nonlinear Equations and Inequalities: Two Variables
    5. 7.4 Partial Fractions
    6. 7.5 Matrices and Matrix Operations
    7. 7.6 Solving Systems with Gaussian Elimination
    8. 7.7 Solving Systems with Inverses
    9. 7.8 Solving Systems with Cramer's Rule
    10. Chapter Review
      1. Key Terms
      2. Key Equations
      3. Key Concepts
    11. Exercises
      1. Review Exercises
      2. Practice Test
  9. 8 Analytic Geometry
    1. Introduction to Analytic Geometry
    2. 8.1 The Ellipse
    3. 8.2 The Hyperbola
    4. 8.3 The Parabola
    5. 8.4 Rotation of Axes
    6. 8.5 Conic Sections in Polar Coordinates
    7. Chapter Review
      1. Key Terms
      2. Key Equations
      3. Key Concepts
    8. Exercises
      1. Review Exercises
      2. Practice Test
  10. 9 Sequences, Probability, and Counting Theory
    1. Introduction to Sequences, Probability and Counting Theory
    2. 9.1 Sequences and Their Notations
    3. 9.2 Arithmetic Sequences
    4. 9.3 Geometric Sequences
    5. 9.4 Series and Their Notations
    6. 9.5 Counting Principles
    7. 9.6 Binomial Theorem
    8. 9.7 Probability
    9. Chapter Review
      1. Key Terms
      2. Key Equations
      3. Key Concepts
    10. Exercises
      1. Review Exercises
      2. Practice Test
  11. Answer Key
    1. Chapter 1
    2. Chapter 2
    3. Chapter 3
    4. Chapter 4
    5. Chapter 5
    6. Chapter 6
    7. Chapter 7
    8. Chapter 8
    9. Chapter 9
  12. Index

Practice Test

For the following exercises, write the equation in standard form and state the center, vertices, and foci.

1.

x 2 9 + y 2 4 =1 x 2 9 + y 2 4 =1

2.

9 y 2 +16 x 2 −36y+32x−92=0 9 y 2 +16 x 2 −36y+32x−92=0

For the following exercises, sketch the graph, identifying the center, vertices, and foci.

3.

( x−3 ) 2 64 + ( y−2 ) 2 36 =1 ( x−3 ) 2 64 + ( y−2 ) 2 36 =1

4.

2 x 2 + y 2 +8x−6y−7=0 2 x 2 + y 2 +8x−6y−7=0

5.

Write the standard form equation of an ellipse with a center at ( 1,2 ), ( 1,2 ), vertex at ( 7,2 ), ( 7,2 ), and focus at ( 4,2 ). ( 4,2 ).

6.

A whispering gallery is to be constructed with a length of 150 feet. If the foci are to be located 20 feet away from the wall, how high should the ceiling be?

For the following exercises, write the equation of the hyperbola in standard form, and give the center, vertices, foci, and asymptotes.

7.

x 2 49 − y 2 81 =1 x 2 49 − y 2 81 =1

8.

16 y 2 −9 x 2 +128y+112=0 16 y 2 −9 x 2 +128y+112=0

For the following exercises, graph the hyperbola, noting its center, vertices, and foci. State the equations of the asymptotes.

9.

( x−3 ) 2 25 − ( y+3 ) 2 1 =1 ( x−3 ) 2 25 − ( y+3 ) 2 1 =1

10.

y 2 − x 2 +4y−4x−18=0 y 2 − x 2 +4y−4x−18=0

11.

Write the standard form equation of a hyperbola with foci at ( 1,0 ) ( 1,0 ) and ( 1,6 ), ( 1,6 ), and a vertex at ( 1,2 ). ( 1,2 ).

For the following exercises, write the equation of the parabola in standard form, and give the vertex, focus, and equation of the directrix.

12.

y 2 +10x=0 y 2 +10x=0

13.

3 x 2 −12x−y+11=0 3 x 2 −12x−y+11=0

For the following exercises, graph the parabola, labeling the vertex, focus, and directrix.

14.

( x−1 ) 2 =−4( y+3 ) ( x−1 ) 2 =−4( y+3 )

15.

y 2 +8x−8y+40=0 y 2 +8x−8y+40=0

16.

Write the equation of a parabola with a focus at ( 2,3 ) ( 2,3 ) and directrix y=−1. y=−1.

17.

A searchlight is shaped like a paraboloid of revolution. If the light source is located 1.5 feet from the base along the axis of symmetry, and the depth of the searchlight is 3 feet, what should the width of the opening be?

For the following exercises, determine which conic section is represented by the given equation, and then determine the angle θ θ that will eliminate the xy xy term.

18.

3 x 2 −2xy+3 y 2 =4 3 x 2 −2xy+3 y 2 =4

19.

x 2 +4xy+4 y 2 +6x−8y=0 x 2 +4xy+4 y 2 +6x−8y=0

For the following exercises, rewrite in the x ′ y ′ x ′ y ′ system without the x ′ y ′ x ′ y ′ term, and graph the rotated graph.

20.

11 x 2 +10 3 xy+ y 2 =4 11 x 2 +10 3 xy+ y 2 =4

21.

16 x 2 +24xy+9 y 2 −125x=0 16 x 2 +24xy+9 y 2 −125x=0

For the following exercises, identify the conic with focus at the origin, and then give the directrix and eccentricity.

22.

r= 3 2−sinθ r= 3 2−sinθ

23.

r= 5 4+6cosθ r= 5 4+6cosθ

For the following exercises, graph the given conic section. If it is a parabola, label vertex, focus, and directrix. If it is an ellipse or a hyperbola, label vertices and foci.

24.

r= 12 4−8sinθ r= 12 4−8sinθ

25.

r= 2 4+4sinθ r= 2 4+4sinθ

26.

Find a polar equation of the conic with focus at the origin, eccentricity of e=2, e=2, and directrix: x=3. x=3.

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