Chapter 9 - XYZ Custom Plus

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520 <strong>Chapter</strong> 9 Solving Equations and Inequalities D Applying the Concepts 83. buildings This Google Earth image shows the Leaning Tower of Pisa. Most buildings stand at a right angle, but the tower is sinking on one side. The angle of inclination is the angle between the vertical and the tower. If the angle between the tower and the ground is 85° what is the angle of inclination? Image © 2008 DigitalGlobe Image NASA 84. geometry This Google Earth image shows the Pentagon. The interior angles of a regular pentagon are all the same and sum to 540°. Find the size of each angle. Image © 2008 Sanborn Find x in each figure and decide if the two angles are complementary or supplementary. [Example 11] 85. 86. x x 35° 35° 87. 88. x 70° x 70° 89. Luke earns $12 per hour working as a math tutor. We can express the amount he earns each week for working x hours with the expression 12x. Indicate with a yes or no, which of the following could be one of Luke’s paychecks. If you answer no, explain your answer. a. $60 for working five hours 90. Kelly earns $15 per hour working as a graphic designer. We can express the amount she earns each week for working x hours with the expression 15x x. Indicate with a yes or no which of the following could be one of Kelly’s paychecks. If you answer no, explain your answer. a. $75 for working five hours b. $100 for working nine hours b. $125 for working nine hours c. $80 for working seven hours c. $90 for working six hours d. $168 for working 14 hours d. $500 for working 35 hours
9.1 Problem Set 521 91. Temperature and Altitude On a certain day, the temperature on the ground is 72 degrees Fahrenheit, and the temperature at an altitude of A feet above the ground is A found from the expression 72 2 } 3 }. Find the temperature at the following altitudes. 00 a. 12,000 feet b. 15,000 feet c. 27,000 feet 92. Perimeter of a Rectangle As you know, the expression 2l 1 2w gives the perimeter of a rectangle with length l and width w. The garden below has a width of 3} 1 2 } feet and a length of 8 feet. What is the length of the fence that surrounds the garden? 3.5 ft A 72˚F 8 ft 93. Cost of Bottled Water A water bottling company charges $7 per month for their water dispenser and $2 for each gallon of water delivered. If you have g gallons of water delivered in a month, then the expression 7 1 2g gives the amount of your bill for that month. Find the monthly bill for each of the following deliveries. a. 10 gallons b. 20 gallons 94. Cellular Phone Rates A cellular phone company charges $35 per month plus 25 cents for each minute, or fraction of a minute, that you use one of their cellular 0 1 25t phones. The expression } 350 gives the amount of 100 money, in dollars, you will pay for using one of their phones for t minutes a month. Find the monthly bill for using one of their phones: a. 20 minutes in a month b. 40 minutes in a month WBC WATER BOTTLE CO. MONTHLY BILL 234 5th Street Glendora, CA 91740 Water dispenser Gallons of water 1 8 DUE 07/23/08 $7.00 $2.00 $23.00 Cell Phone Company Grover Beach, CA August 2008 DUE 08/15/08 Monthly Access per Phone: Charges: $0.25/minute 1 50 $35.00 $12.50 $47.50 Getting Ready for the Next Section Add. 95. 4 1 (24) 100. 23 1 12 96. 2 1 (22) 101. 97. 22 1 (24) 98. 22 1 (25) 99. 25 1 2 5 } 1 } 3 5 102. } 1 } 2 103. 2 } 3 1 } 3 104. 2 } 2 1 } 2 8 4 6 3 4 4 3 3
Page 1 and 2: Solving Equations and Inequalities
Page 3 and 4: The Distributive Property and Algeb
Page 5 and 6: 9.1 The Distributive Property and A
Page 7 and 8: 9.1 The Distributive Property and A
Page 9 and 10: 9.1 Problem Set 517 Problem Set 9.1
Page 11: 9.1 Problem Set 519 Find the value
Page 15 and 16: Introduction . . . The Addition Pro
Page 17 and 18: 9.2 The Addition Property of Equali
Page 21 and 22: 9.2 Problem Set 529 Applying the Co
Page 23 and 24: The Multiplication Property of Equa
Page 25 and 26: 9.3 The Multiplication Property of
Page 29 and 30: 9.3 Problem Set 537 Find the value
Page 31 and 32: Introduction . . . Linear Equations
Page 33 and 34: 9.4 Linear Equations in One Variabl
Page 37 and 38: 9.4 Problem Set 545 C Applying the
Page 39 and 40: Introduction . . . Applications As
Page 41 and 42: 9.5 Applications 549 Step 2 Assign
Page 43 and 44: 9.5 Applications 551 Example 4 The
Page 45 and 46: 9.5 Applications 553 Step 2 Assign
Page 49 and 50: 9.5 Problem Set 557 Coin Problems 3
Page 51 and 52: Introduction . . . Evaluating Formu
Page 53 and 54: 9.6 Evaluating Formulas 561 The rat
Page 57 and 58: 9.6 Problem Set 565 B Maximum Heart
Page 59 and 60: 9.6 Problem Set 567 Applying the Co
Page 61 and 62: Chapter 9 Summary Combining Similar
Page 63 and 64:
Chapter 9 Review Simplify the expre
Page 65 and 66:
Chapter 9 Cumulative Review 573 28.
Page 67 and 68:
Chapter 9 Projects Solving Equation
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Chapter 9 - XYZ Custom Plus

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