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Section 2.7 Mixture Applications and Uniform Motion 179 13. A church had an ice cream social and sold tickets for $3 and $2.When the social was over, 81 tickets had been sold totaling $215. How many of each type of ticket did the church sell? (See Example 1.) 53 tickets were sold at $3 and 28 tickets were sold at $2. 14. Anna is a teacher at an elementary school. She purchased 72 tickets to take the first-grade children and some parents on a field trip to the zoo. She purchased children’s tickets for $10 each and adult tickets for $18 each. She spent a total of $856. How many of each ticket did she buy? Anna purchased 17 adult tickets and 55 children’s tickets. 19. A container holds 7 ounces (oz) of liquid. Let x represent the number of ounces of liquid in another container. Write an expression for the total amount of liquid. x 7 20. A bucket contains 2.5 L of a bleach solution. Let n represent the number of liters of bleach solution in a second bucket. Write an expression for the total amount of bleach solution. n 2.5 21. If Charlene invests $2000 in a certificate of deposit and d dollars in a stock, write an expression for the total amount she invested. d 2000 22. James has $5000 in one savings account. Let y represent the amount he has in another savings account. Write an expression for the total amount of money in both accounts. y 5000 23. How much of a 5% ethanol fuel mixture should be mixed with 2000 gal of 10% ethanol fuel mixture to get a mixture that is 9% ethanol. (See Example 2.) Mix 500 gal of 5% ethanol fuel mixture. 24. How many ounces of a 50% antifreeze solution must be mixed with 10 oz of an 80% antifreeze solution to produce a 60% antifreeze solution? 20 oz of 50% antifreeze solution $3 Tickets $2 Tickets Total Number of tickets Cost of tickets Adults Children Total Number of tickets Cost of tickets 15. Josh downloaded 25 tunes from an online site for his MP3 player. Some songs cost $0.90 each while others were $1.50 each. He spent a total of $27.30. How many of each type of song did he download? Josh downloaded 17 songs for $0.90 and 8 songs for $1.50. 16. During the past year, Mrs. Singh purchased 32 books at a wholesale club store. She purchased softcover books for $4.50 each and hardcover books for $13.50 each. The total cost of the books was $243. How many of each type of book did she purchase? Mrs. Singh purchased 21 softcover books and 11 hardcover books. 17. Angelina purchased 45 bottled drinks for her graduation party. She purchased soda for $1.60 each and bottles of flavored water for $2.00 each. The total cost of the drinks was $80. How many of each type did she buy? Angelina purchased 25 bottles of soda and 20 bottles of flavored water. 18. Mr. Garvey purchased 58 food items at a fast food restaurant for his Little League team. He purchased hamburgers for $2.50 each and french fries for $1.50 each. He spent a total of $127. How many hamburgers and how many french fries did he purchase? Mr. Garvey purchased 40 hamburgers and 18 french fries. Concept 2: Applications Involving Mixtures 50% 80% Final Mixture: Antifreeze Antifreeze 60% Antifreeze Number of ounces of solution Number of ounces of pure antifreeze 5% 10% Final Mixture: Ethanol Ethanol 9% Ethanol Number of gallons of fuel mixture Number of gallons of pure ethanol Writing     Translating Expression     Geometry      Scientific Calculator     Video


miller_introductory_algebra_3e_ch1_3
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