Page 187 - Basic College Mathematics with Early Integers

164 C HAPTE R 2 I INTEGERS AND INTRODUCTION TO VARIABLES

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101. 16 (-2) + 4 102. 3 (-12) - 8 103. 5 + 6 , (-3) 104. -6 + (-10) , (-2)

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105. 16 + (-3) 12 , 4 106. (-12) + 25 1 , (-5) 107. 4 - (8 - 3) 2 108. 4 - 90
(-4)(-3) - (-2)(-1) 4(12 - 18)
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109. -(-4) ƒ -3 ƒ - 5 110. ƒ 5 - 1 ƒ 2 # (-5) 111. 112.
-10 + 5 -10 , (-2 - 3)

Find the average of each list of numbers.

113. -18, 25, -30, 7, 0, -2 114. -45, -40, -30, -25

Evaluate each expression for x =-2 and y = 1.
3x 5y - x
2
115. 2x - y 116. y + x 2 117. 118.
6 -y

119. x 2 120. -x 2 121. 7 - x 2 122. 100 - x 3

Mixed Review

Perform the indicated operations.

123. (-4) 2 124. -4 2 125. -6 + (-9) 126. -16 - 3

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127. -4(-12) 128. 129. -76 - (-97) 130. -9 + 4
-4

131. Joe owed his mother $32. He gave her $23.Write 132. The temperature at noon on a Monday in December
his financial situation as a signed number. was -11°C. By noon on Tuesday, it had warmed by
17°C.What was the temperature at noon on
Tuesday?

133. The top of a mountain has an altitude of 12,923 feet. 134. Wednesday’s lowest temperature was -18°C.
The bottom of a valley is 195 feet below sea level. The cold weather continued and by Friday it had
Find the difference between these two elevations. dropped another 9°C.What was the temperature
on Friday?

Simplify.

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135. (3 - 7) , (6 - 4) 3 136. (4 + 6) , (2 - 7) 2 137. 3(4 + 2) + (-6) - 3 2
Copyright 2012 Pearson Education, Inc. Copyright 2012 Pearson Education, Inc.
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138. 4(5 - 3) - (-2) + 3 3 139. 2 - 4 3 + 225 140. 4 - 6 5 + 21

- ƒ -14ƒ - 6
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141. 142. 5(7 - 6) - 4(2 - 3) + 2 4
7 + 2(-3)