104 Chapter 2 Integers and Algebraic Expressions For Exercises 55–66, translate each English phrase to a mathematical expression. Then simplify. (See Examples 3 and 4.) 55. 14 minus 23 56. 27 minus 40 57. The difference of 105 and 110 58. The difference of 70 and 98 59. 320 decreased by 20 60. 150 decreased by 75 61. Subtract 12 from 5. 62. Subtract 10 from 16. 63. 21 less than 34 64. 22 less than 90 65. Subtract 24 from 35 66. Subtract 189 from 175 67. The liquid hydrogen in the space shuttle’s main engine is 423F. The temperature in the engine’s combustion chamber reaches 6000F. Find the difference between the temperature in the combustion chamber and the temperature of the liquid hydrogen. (See Example 5.) 68. Temperatures on the Moon range from 184C during its night to 214C during its day. Find the difference between the highest temperature on the Moon and the lowest temperature. 69. Ivan owes $320 on his credit card; that is, his balance is $320. If he charges $55 for a night out, what is his new balance? 70. If Justin’s balance on his credit card was $210 and he made the minimum payment of $25, what is his new balance? 71. The Campus Food Monday $1786 Tuesday $2342 Wednesday $754 Thursday $321 Friday $1597 Court reports its total profit or loss each day. During a 1-week period, the following profits or losses were reported. If the Campus Food Court’s balance was $17,476 at the beginning of the week, what is the balance at the end of the reported week? Check $150 Check $25 Paycheck (deposit) $480 ATM $200 Cash (deposit) $80 For Exercises 73–76, refer to the graph indicating the change in value of the Dow Jones Industrial Average for a given week. 73. What is the difference in the change in value between Tuesday and Wednesday? 74. What is the difference in the change in value between Thursday and Friday? 75. What is the total change for the week? 76. Based on the values in the graph, did the Dow gain or lose points for the given week? Change in Dow Jones Industrial Average Points 80 60 40 20 0 20 40 60 80 100 120 56 98 40 66 16 Mon. Tues. Wed. Thrs. Fri. 72. Jeff’s balance in his checking account was $2036 at the beginning of the week. During the week, he wrote two checks, made two deposits, and made one ATM withdrawal.What is his ending balance?
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