Section 1.6 Multiplication and Division of Real Numbers 69 79. -2x2 + 4x + 3 for x=-2, -1, 1 2 , 2 80. -x2 - 3x + 4 for x=-2, -1, 1 2 , 2 81. 1(x1 - x2)2 + (y1 - y2)2 for x1= -1, x2 = -4, y1 = -3, y2 = 1 82. 1(x1 - x2)2 + (y1 - y2)2 for x1= -7, x2 = 13, y1 = 9, y2 = -6 83. ux - 2u x + 1 for x=-2, -1, 0, 1, 2 84. ux - 2u x + 2 for x=-2, -1, 0, 1, 2 85. y2 - y1 x2 - x1 for x1= -2, x2 = 8, y1 = -4, and y2 = -6 86. y2 - y1 x2 - x1 for x1= 5, x2 = -3, y1 = -7, and y2 = 2 87. b2 - 4ac for a = 3, b = -5, c = -6 88. b2 - 4ac for a = -1, b = 6, c = -3 89. The volume of an inverted cone is the square of the radius, times the product of π and 1 3 and the height of the cone. Write an equation that represents the volume of an inverted cone, where r is the radius and h is the height. Then use the equation to find the volume of a liquid storage tank that is an inverted cone with radius 30 in. and height 48 in. Round to the nearest integer. 90. The volume of a rectangular box is the product of the length, width, and height. Write an equation that represents the volume of a rectangular box, where l is the length, w is the width, and h is the height. Then use the equation to find the volume of a liquid storage tank that is a rectangular box with the length 24.5 ft, width 36.5 ft, and height 56 ft. Round to the nearest integer. 91. The chart shows the closing daily price of Hershey Company’s stock for October 4 to October 8, 2010. (Source: http://www.google.com/finance/historical?q=NYSE:ELY ) Date Closing Price Daily Change in Price Percent Change in Price 10/8/2010 $48.75 10/7/2010 $47.88 10/6/2010 $48.17 10/5/2010 $48.10 10/4/2010 $47.63 n/a n/a a. Complete the chart by showing how the price of the stock changed from the previous day to the next and by calculating the percent change in the price for each day. b. After completing the chart, find the average daily change in price. 92. The following chart shows the closing weekly price of Walmart Stores’ stock for September 10 to October 8, 2010. (Source: http://www.google.com/finance/ historical?q=NYSE:ELY ) Date Closing Price Weekly Change in Price Percent Change in Price 10/8/2010 $54.41 10/1/2010 $53.36 9/24/2010 $54.08 9/17/2010 $53.01 9/10/2010 $51.97 a. Complete the chart by showing how the price of the stock changed from the previous week to the next and by calculating the percent change in the price for each week. b. After completing the chart, find the average weekly change in price. Mix ’Em Up! Perform the indicated operation and simplify. 93. (-7)(5) 94. (-13)( -11) 95. (-3.03)(10) 96. (-7.36)(-1000) 97. (-55)a- 7 11 b 98. -4a 1 20 b 99. 34 100. 64 101. a4 7 ba- 3 16 b 102. a- 10 7 b a- 14 25 b 103. -63 -7 104. -44 11 105. -54 106. 103 107. a 2 5 b 3 108. a 3 7 b 3 109. (-4)4 110. -(-3)5 111. -0.24 112. -(-0.5)3 113. (4.2)(-3.5) 114. (-1.2)(-5.2) 115. a- 2 3 b a- 3 2 b 116. a- 7 5 ba- 5 7 b 117. -142 118. -63 119. 0 -2 120. -2 0 121. 2 ÷ 0 122. 0 ÷ (-9) 123. 10 -9 ÷ (-25) 124. -12 5 ÷ (-10) 125. a- 15 19 b ÷ a- 6 19 b 126. a- 8 21 b ÷ a12 21 b
hendricks_beginning_algebra_1e_ch1_3
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