Page 171 - Basic College Mathematics with Early Integers

148 C HAPTE R 2 I INTEGERS AND INTRODUCTION TO VARIABLES

Objective Translating Translate each phrase; then simplify. See Example 17.

99. Find the quotient of -54 and 9. 100. Find the quotient of -63 and -3.

101. Find the product of -42 and -6. 102. Find the product of -49 and 5.

Translating Translate each phrase to an expression. Use x to represent “a number.” See Example 17.

103. The product of -71 and a number 104. The quotient of -8 and a number

105. Subtract a number from -16. 106. The sum of a number and -12

107. -29 increased by a number 108. The difference of a number and -10

109. Divide a number by -33 . 110. Multiply a number by -17.

Solve. See Example 17.

111. A football team lost four yards on each of three 112. Joe Norstrom lost $400 on each of seven
consecutive plays. Represent the total loss as a consecutive days in the stock market. Represent his
product of signed numbers and find the total loss. total loss as a product of signed numbers and find
his total loss.

113. A deep-sea diver must move up or down in the 114. A weather forecaster predicts that the temperature
water in short steps in order to keep from getting a will drop five degrees each hour for the next six
physical condition called the “bends.” Suppose a hours. Represent this drop as a product of signed
diver moves down from the surface in five steps of numbers and find the total drop in temperature.
20 feet each. Represent his total movement as a
product of signed numbers and find the product.

The graph shows melting points in degrees Celsius of selected elements. Use this graph to answer Exercises 115 through 118.

115. The melting point of nitrogen is 3 times the melting Melting Points of
point of radon. Find the melting point of nitrogen. Selected Elements
80
63
116. The melting point of rubidium is -1 times the 60
melting point of mercury. Find the melting point 40
of rubidium. 20
Degrees Celsius

117. The melting point of argon is -3 times the melting 0
point of potassium. Find the melting point of argon. 20
40
118. The melting point of strontium is -11 times the 60 39
melting point of radon. Find the melting point 80 70
of strontium.
100
Mercury Radon Potassium

119. During one month Target Corporation posted a 120. In 2007, General Motors posted a full-year net Copyright 2012 Pearson Education, Inc.
reduction in sales of -$2.1 million. If this income of -$38,732 million . If the income rate was
continues, what will Target’s sales figures look like consistent over the entire year, how much would you
in three months, at the end of the quarter? (Source: expect General Motors’ net income to be for each
Target Corporation) quarter? (Source: General Motors)