Prentice Hall Algebra 2
  1. Open-Ended Write and graph a system of inequalities for which the solution is bounded by a dashed vertical line and a solid horizontal line.
  2. Writing Explain how you determine where to shade when solving a system of inequalities.
  3. Given a system of two linear inequalities, explain how you can pick test points in the plane to determine where to shade the solution set.

In Exercises 36–45, identify the inequalities A, B, and C for which the given ordered pair is a solution.

  1. x plus y less than or equal to 2

    A graph of a solid line falls through (0, 2) and (2, 0). The region below the line is shaded. All points are approximate.

  2. y less than or equal to , 3 halves , x minus 1

    A graph of a solid line rises through (0, negative 1) and (2, 2). The region below the line is shaded. All points are approximate.

  3. y greater than negative , 1 third , x minus 2

    A graph of a dashed line falls through (negative 3, negative 1) and (0, negative 2). The region above the line is shaded. All points are approximate.

  1. (0, 0)
  2. open negative 2 comma negative 5 close
  3. open negative 2 comma 0 close
  4. open 0 comma negative 2 close
  5. open negative 15 comma 15 close
  6. (3, 2)
  7. (2, 0)
  8. open negative 6 comma 0 close
  9. open 4 comma negative 1 close
  10. open negative 8 comma negative 11 close

Solve each system of inequalities by graphing.

  1. left brace . table with 3 rows and 1 column , row1 column 1 , x plus y less than 8 , row2 column 1 , x greater than or equal to 0 , row3 column 1 , y greater than or equal to 0 , end table
  2. left brace . table with 3 rows and 1 column , row1 column 1 , 2 y minus 4 x less than or equal to 0 , row2 column 1 , x greater than or equal to 0 , row3 column 1 , y greater than or equal to 0 , end table
  3. left brace . table with 3 rows and 1 column , row1 column 1 , y greater than or equal to negative 2 x plus 4 , row2 column 1 , x greater than negative 3 , row3 column 1 , y greater than or equal to 1 , end table
  4. left brace . table with 2 rows and 1 column , row1 column 1 , y less than or equal to , 2 thirds , x plus 2 , row2 column 1 , y greater than or equal to vertical line x vertical line plus 2 , end table
  5. left brace . table with 2 rows and 1 column , row1 column 1 , y less than x minus 1 , row2 column 1 , y greater than negative vertical line x minus 2 vertical line plus 1 , end table
  6. left brace . table with 2 rows and 1 column , row1 column 1 , 2 x plus y less than or equal to 3 , row2 column 1 , y greater than vertical line x plus 3 vertical line negative 2 , end table
  7. left brace . table with 2 rows and 1 column , row1 column 1 , y less than vertical line x minus 1 vertical line plus 2 , row2 column 1 , x greater than or equal to 0 , end table
  8. left brace . table with 2 rows and 1 column , row1 column 1 , y greater than vertical line x minus 1 vertical line plus 1 , row2 column 1 , y less than or equal to negative vertical line x minus 3 vertical line plus 4 , end table
  9. left brace . table with 2 rows and 1 column , row1 column 1 , y less than or equal to vertical line x vertical line negative 2 , row2 column 1 , y less than or equal to vertical line x vertical line plus 2 , end table

C Challenge

Geometry Write a system of inequalities to describe each shaded figure.

  1. A graph of a shaded diamond centered at the origin has vertices at points (0, 2), (2, 0), (0, negative 2), and (negative 2, 0).
  2. A graph of a shaded trapezoid is centered at the y-axis, with vertices at (negative 2, 3), (2, 3), (3, 0), and (negative 3, 0).
  3. A graph of a shaded parallelogram is in quadrant 1, with vertices at (2, 4), (6, 4), (4, 0) and the origin.
    1. Graph the “bowtie” inequality, vertical line y vertical line less than or equal to vertical line x vertical line .
    2. Write a system of inequalities to describe the graph shown below.

      Two shaded triangles share a vertex at the origin. The first triangle has vertices at (negative 3, 1), the origin, and (negative 3, negative 1). The second triangle has vertices at (3, 1) and (3, negative 1) and the origin. All points are approximate.


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Table of Contents

Prentice Hall Algebra 2 Chapter 1 Expressions, Equations, and Inequalities Chapter 2 Functions, Equations, and Graphs Chapter 3 Linear Systems Chapter 4 Quadratic Functions and Equations Chapter 5 Polynomials and Polynomial Functions Chapter 6 Radical Functions and Rational Exponents Chapter 7 Exponential and Logarithmic Functions Chapter 8 Rational Functions Chapter 9 Sequences and Series Chapter 10 Quadratic Relations and Conic Sections Chapter 11 Probability and Statistics Chapter 12 Matrices Chapter 13 Periodic Functions and Trigonometry Chapter 14 Trigonometric Identities and Equations Skills Handbook English/Spanish Illustrated Glossary Selected Answers Index Acknowledgments