Section 1.5 Multiplication and Division of Real Numbers 95 3 10 2142 8 4 5 122 5 10 1 7 3142 519 112 108. 109. Undefined 110. Undefined 9 2 3 6534 161224 152 01 0 05 0 6 4 332 15 324 8 22 2 111. 112. 113. 48 9 1 02 9 0 05 7 0 010 0 06 0 16 114. 115. 116. 6 332 16 8242 117. 7 118. 3 2 10 15 12 436 15 8242 4 06 10 0 2 02 5 0 1 02 6 0 03 5 0 13 11 For Exercises 119–124, evaluate the expression for x 2, y 4, and z 6 . (See Example 7.) 119. 120. 121. x 4 412x z2 40 x2 4 2 7 2 3x 2y 613x y2 60 122. 123. 124. 10 5x 2z y x y 105x? 1015x2 10 5x 8 125. Is the expression equal to Explain. 126. Is the expression equal to ? Explain. Yes, the parentheses indicate that the divisor is the quantity 5x. 10 15x2. No.The first expression is equivalent to The second is 10 5 x. For Exercises 127–134, translate the English phrase into an algebraic expression. Then evaluate the expression. 127. The product of 3.75 and 0.3 128. The product of 0.4 and 1.258 3.7510.32; 1.125 10.4211.2582; 0.5032 16 2 18 5 189 16 a8 3 b; 1142 9129. The quotient of and 130. The quotient of and 5 5 131. The number plus the quantity 6 times 0.4 0.42 0.4 610.422; 2.92 1 133. The number minus the quantity 6 times 4 1 4 6 a 1 3b ; 7 4 13 132. The number 0.5 plus the quantity 2 times 0.125 156 2 0.5 12210.1252; 0.25 134. Negative five minus the quantity times 38 5 a 5 6b 3 8 ; 75 16 135. For 3 weeks, Jim pays $2 a week for lottery tickets. Jim has one winning ticket for $3. Write an expression that describes his net gain or loss. How much money has Jim won or lost? loss of $3 3122 3 3; 136. Stephanie pays $2 a week for 6 weeks for lottery tickets. Stephanie has one winning ticket for $5. Write an expression that describes her net gain or loss. How much money has Stephanie won or lost? 3 14 1 7 ; 3 2 17 2162 5 7; loss of $7 137. Lorne sells ads for the local newspaper and has a quota for the number of ads he must sell each week. For the first two days of the week, Lorne was 5 above his daily quota. For the last three days of the week, Lorne was 3 below his daily quota. Write an expression that describes the net amount he was above or below his quota. Interpret the result. 2152 3132 1; Lorne was 1 sale above quota for the week. 138. Valerie trades stocks each day and analyzes her results at the end of the week. The first day of the week she had a profit of $650. The next two days she had a loss of $400 each day and the last two days she had a loss of $150 each day. Write an expression that describes Valerie’s profit or loss for the week. Interpret the result. 650 214002 211502 450; Valerie lost $450 for the week. Writing Translating Expression Geometry Scientific Calculator Video
miller_introductory_algebra_3e_ch1_3
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