Section 1.6 Multiplication and Division of Real Numbers 73 For Exercises 111–116, evaluate the expression for . (See Example 7.) 111. x2 112. x2 113. 114. 115. 116. 117. Is the expression equal to Explain. 118. Is the expression equal to ? Explain. For Exercises 119–126, write each English phrase as an algebraic expression.Then evaluate the expression. 119. The product of 3.75 and 0.3 120. The product of 0.4 and 1.258 121. The quotient of 16 5 and 1 2 122. The quotient of 1142 3 and 17 89 10 5x 105x? 1015x2 10 5x 2z y x 3x 2y y 613x y2 412x z2 x 2, y 4, and z 6 123. The number plus the quantity 6 times 0.4 124. The number 0.5 plus the quantity times 0.125 0.42 14 125. The number minus the quantity 13 6 times 2 126. Negative five minus the quantity times 38 127. 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? 128. 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? 129. Lorne sells ads for the local newspaper and has a quota for the number of 156 2 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. 130. 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. 131. A pediatrician analyzed the effect of a special baby food on five toddlers. He recorded the amount of weight lost or gained (in ounces) by each child for one month as shown in the table. Baby A B C D E Gain/Loss (oz) 12 15 4 9 3 Write an expression to calculate the average gain or loss in weight of the children and then simplify. Interpret your answer. (Hint: See Appendix A.1 for the formula for average (or mean).) 132. At the end of a 2-month class, a personal trainer analyzed the effect of her new exercise routine by recording the gain or loss (in inches) in waist measurements of her clients. The results are shown in the table. Client A B C D E F Gain/Loss (in.) 1.5 2 1.5 2.5 3 0.5 Write an expression to calculate the average gain or loss in waist measurement and then simplify. Interpret your answer.
miller_beginning_intermediate_algebra_4e_ch1_3
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