Page 155 - Basic College Mathematics with Early Integers

132 C HAPTE R 2 I INTEGERS AND INTRODUCTION TO VARIABLES

93. The all-time record low temperature for Wyoming is
-66°F, which was recorded on February 9, 1933.
Kansas’s all-time record low temperature is 26°F Wyoming
New York
higher than Wyoming’s record low.What is Kansas’s
record low temperature? (Source: National Climatic
Data Center)

94. The all-time record low temperature for New York
is -52°F, which occurred on February 13, 1905. In
Mississippi, the lowest temperature ever recorded
is 33°F higher than New York’s all-time low
Kansas
temperature.What is the all-time record low Mississippi
temperature for Mississippi? (Source: National
Climatic Data Center)
95. The deepest spot in the Pacific Ocean is the Mariana 96. The deepest spot in the Atlantic Ocean is the Puerto
Trench, which has an elevation of 10,924 meters below Rico Trench, which has an elevation of 8605 meters
sea level.The bottom of the Pacific’s Aleutian Trench below sea level.The bottom of the Atlantic’s Cayman
has an elevation 3245 meters higher than that of the Trench has an elevation 1070 meters above the level
Mariana Trench. Use a negative number to represent of the Puerto Rico Trench. Use a negative number to
the depth of the Aleutian Trench. (Source: Defense represent the depth of the Cayman Trench. (Source:
Mapping Agency) Defense Mapping Agency)

Review

Subtract. See Section 1.4.

97. 44 - 0 98. 91 - 0 99. 200 - 59 100. 400 - 18

Concept Extensions

101. Name 2 numbers whose sum is -17. 102. Name 2 numbers whose sum is -30.

Each calculation below is incorrect. Find the error and correct it. See the Concept Check in this section.

103. 7 + 1-102 17 104. -4 + 14 -18

105. -10 + 1-122 -120 106. -15 + 1-172 32

For Exercises 107 through 110, determine whether each statement is true or false.

107. The sum of two negative numbers is always a 108. The sum of two positive numbers is always
negative number. a positive number.
Copyright 2012 Pearson Education, Inc. Copyright 2012 Pearson Education, Inc.
109. The sum of a positive number and a negative 110. The sum of zero and a negative number
number is always a negative number. is always a negative number.

111. In your own words, explain how to add two 112. In your own words, explain how to add a positive
negative numbers. number and a negative number.