Beginning Algebra, 11th Edition

(b)x= 5 180 CHAPTER 3 Linear Equations and Inequalities in Two Variables; Functions xy 2 6 3 xy 5 2 5 6 5 3 Ordered Pair ...

NOTE In a plane, bothnumbers in the ordered pair are needed to locate a point. The ordered pair is a name for the point. SECTION ...

Completing Ordered Pairs to Estimate the Number of Twin Births The annual number of twin births in the United States from 2001 t ...

SECTION 3.1 Linear Equations in Two Variables; The Rectangular Coordinate System^183 CAUTION The equation in Example 6is valid o ...

Complete each table of values. Write the results as ordered pairs. See Example 4. 4 x+ 3 y= 24 32. 2 x+ 3 y= 12 33. 4 x- 9 y=- ...

2 x- 5 y= 10 69.y+ 4 = 0 70.x- 5 = 0 SECTION 3.1 Linear Equations in Two Variables; The Rectangular Coordinate System 185 xy 0 ...

76.The table shows the number of U.S. students who studied abroad (in thousands) for several aca- demic years. 186 CHAPTER 3 Lin ...

79.See Exercises 77 and 78.What is the target heart rate zone for age 20? Age 40? 80.SeeExercises 77 and 78.What is the target h ...

Graphing a Linear Equation Graph At least two different points are needed to draw the graph. First let and then let in the equat ...

SECTION 3.2 Graphing Linear Equations in Two Variables^189 This gives the ordered pairs and To find a third point, we let Let Mu ...

The intercepts are and. To find a third point, we let. Let. Multiply. y=- 4 Subtract 8. 8 + y= 4 2142 + y= 4 x= 4 2 x+ y= 4 1 0, ...

SECTION 3.2 Graphing Linear Equations in Two Variables^191 We use the ordered pairs 1 - 6, - 22 , 1 0, 0 2 ,and 1 6, 2 2 to draw ...

Graphing an Equation of the Form (Vertical Line) Graph First we add 3 to each side of the equation to get All ordered-pair solut ...

SECTION 3.2 Graphing Linear Equations in Two Variables^193 The equation of the x-axis is the horizontal line ,and the equation o ...

NOW TRY 194 CHAPTER 3 Linear Equations and Inequalities in Two Variables; Functions OBJECTIVE 5 Use a linear equation to model d ...

SECTION 3.2 Graphing Linear Equations in Two Variables^195 7.Concept Check Match the information about each graph in Column I wi ...

196 CHAPTER 3 Linear Equations and Inequalities in Two Variables; Functions x y 1 1 0 x y 1 1 0 x y 1 1 0 x y 1 1 0 Find the x-i ...

Solve each problem. See Example 7. 67.The weight y(in pounds) of a man taller than 60 in. can be approximated by the linear equa ...

72.Demand for an item is often closely related to its price. As price increases, demand de- creases, and as price decreases, dem ...

Find each quotient. See Section 1.8. 5 - 1 - 72 - 4 - 1 - 12 - 2 - 1 - 42 3 - 1 - 12 - 3 - 5 2 - 7 4 - 2 8 - 5 P ...