Idiot\'s Guides Basic Math and Pre-Algebra

Chapter 10: Solving Equations and Inequalities 129 If there are variable terms on both sides of the equation, add or subtract to ...

130 Part 2: Into the Unknown CHECK POINT Solve each equation. If there is no solution, say that. If all numbers are solutions, l ...

Chapter 10: Solving Equations and Inequalities 131 Solving Inequalities Inequalities can be solved in much the same way as equat ...

132 Part 2: Into the Unknown Picturing the Solution The solution of an equation is usually just one number, so when you say x = ...

CHAPTER 11 Coordinate Graphing ............................................................... In This Chapter How to plot poin ...

134 Part 2: Into the Unknown The Coordinate Plane .............................................................................. ...

Chapter 11: Coordinate Graphing 135 DEFINITION The Cartesian coordinate system, named for René Descartes, is a rectangular coord ...

136 Part 2: Into the Unknown CHECK POINT Plot each point in the coordinate plane. (1,8) (-6,2) (3,-6) 4. (-4,-1) 5. (0,2) Grap ...

Chapter 11: Coordinate Graphing 137 To graph the equation 3x + 2y = 6, make a table with a few possible values of x. x 3 x + 2y ...

138 Part 2: Into the Unknown WORLDLY WISDOM If the coefficient of x is a fraction, choose x-values that are divisible by the den ...

Chapter 11: Coordinate Graphing 139 -6 -2 062 -2 2 4 6 -4 -6 -8-9 -7 -5 -4 -1-3 134 5 78 9 -8 -9 -1 -3 -5 -7 8 9 1 3 5 7 -10 10 ...

140 Part 2: Into the Unknown Quick Graphing Making a table and plotting points will always get you a graph, but it can be a slow ...

Chapter 11: Coordinate Graphing 141 CHECK POINT Graph each equation by intercept-intercept. x y 10 12.^6212 xy 23 9xy 14. ...

142 Part 2: Into the Unknown The slope of the line through the points (4,-1) and (1,2) is m^21 14 3 3 555 - 1 2 - 2 - -6 -2 062 ...

Chapter 11: Coordinate Graphing 143 To draw the graph of an equation quickly, arrange the equation so that y is isolated and the ...

144 Part 2: Into the Unknown CHECK POINT Graph each equation using y-intercept and slope. yx^3 4 5 -^11 yx 51 - 46 23. yx 5 - 3 ...

Chapter 11: Coordinate Graphing 145 Graphs of Inequalities The graph of an equation is a picture of all the pairs of numbers tha ...

146 Part 2: Into the Unknown You want the points with y-coordinates that are less than^3 4 x 2. The points on the line have y-c ...

Chapter 11: Coordinate Graphing 147 The Least You Need to Know The coordinate system assigns a pair of numbers, called coordina ...

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