Algebra I All-in-One For Dummies. Mary Jane Sterling

Answers to Chapter 25 Quiz Chapter 26: Coordinating Systems of Equations and Graphing Defining Solutions of Systems of Equations Solving Systems of Linear Equations Solving Systems Involving Non-Linear Equations Taking on Systems of Three Linear Equations Practice Problems Answers and Explanations Whaddya Know? Chapter 26 Quiz Answers to Chapter 26 Quiz

      13  Index

      14  About the Author

      15  Connect with Dummies

      16  End User License Agreement

      List of Tables

      1 Chapter 2TABLE 2-1 Comparing Positive and Negative Numbers

      2 Chapter 8TABLE 8-1 Rules of Divisibility

      3 Chapter 24TABLE 24-1 QuadrantsTABLE 24-2 Axes

      List of Illustrations

      1 Chapter 1FIGURE 1-1: A number line from 0 to 5 with half-unit increments.FIGURE 1-2: A number line from –10 to 10 with one-unit increments.

      2 Chapter 2FIGURE 2-1: A number line.FIGURE 2-2: Another number line.FIGURE 2-3: Positive and negative numbers on a number line.

      3 Chapter 8FIGURE 8-1: Finding the prime factors using a tree.

      4 Chapter 9FIGURE 9-1: Pascal’s Triangle can help you find powers of binomials.

      5 Chapter 19FIGURE 19-1: The graphs of greater-than and less-than-or-equal-to.FIGURE 19-2: A graph of the inequality.FIGURE 19-3: A graph of the interval.FIGURE 19-4: A graph of the inequality.FIGURE 19-5: A graph of the interval.FIGURE 19-6: A graph of an inequality.FIGURE 19-7: A graph of an inequality.FIGURE 19-8: A number line helps you find the signs of the factors and their pr...FIGURE 19-9: Filling in the signs between the critical numbers.FIGURE 19-10: The sign changes at each critical number in this problem.FIGURE 19-11: The sign of the quotient is shown.FIGURE 19-12: The 1 and –1 are included in the solution.

      6 Chapter 20FIGURE 20-1: Triangulating the “right” way.

      7 Chapter 21FIGURE 21-1: Fencing three sides of the field.FIGURE 21-2: Volume is determined by multiplying length, width, and height.FIGURE 21-3: Some people believe pyramids have preservation powers.FIGURE 21-4: Basketballs, globes, planets, and sometimes oranges are spheres.FIGURE 21-5: The diameter is the longest distance across a circle.FIGURE 21-6: The corral along a river.FIGURE 21-7: ABC is similar to DEF.FIGURE 21-8: Trapezoidal room.

      8 Chapter 23FIGURE 23-1: Visualizing containers can help with mixture problems.FIGURE 23-2: Assigning prices and pounds.

      9 Chapter 24FIGURE 24-1: Identifying quadrants.FIGURE 24-2: Graphing

.FIGURE 24-3: Horizontal lines are parallel to the x-axis.FIGURE 24-4: When all the x-coordinates are the same, you get a vertical line.FIGURE 24-5: Pick a line — see its slope.FIGURE 24-6: Horizontal lines have a 0 slope. Vertical lines have an undefined ...FIGURE 24-7: Parallel lines are like railroad tracks; perpendicular lines meet ...

      10 Chapter 25FIGURE 25-1: The intersection of two lines at a point (1,–2).FIGURE 25-2: The simplest parabola.FIGURE 25-3: A steeper parabola and a flatter parabola.FIGURE 25-4: Parabolas spooning.FIGURE 25-5: Pretty parabolas all in a row.FIGURE 25-6: The circle has a radius of 5.FIGURE 25-7: The x-intercepts and the graph of the polynomial.FIGURE 25-8: The intercepts help with the graph of the polynomial.FIGURE 25-9: Use a dashed line when the line is not included.FIGURE 25-10: The origin is included in the solution.FIGURE 25-11: The negative values are flipped over the x-axis.FIGURE 25-12: The 2 multiplier steepens the graph.FIGURE 25-13: Parabolas galore.

      Guide

      1  Cover

      2  Title Page

      3  Copyright

      4 Table of Contents

      5  Begin Reading

      6  Index

      7  About the Author

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