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7. Four-fifths of the senior class went to prom. If 324 seniors went to prom, how many are there in the senior class?

7. Four-fifths of the senior class went to prom. If 324 seniors went to prom, how many are there in the senior class?

Mathematics For Machine Technology
Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter25: Achievement Review—section Two
Section: Chapter Questions
Problem 25AR: Engine pistons and cylinder heads are made of an aluminum casting alloy that contains 4% silicon,...
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7. Four-fifths of the senior class went to prom. If 324 seniors went to prom, how many are there in the senior class? 31 9. Lee filled up his gas tank before starting a road trip. If he has used 5.8 gallons two hours into the trip, and has 12.4 gallons remaining, how many gallons of gas did he start with? 11. An electrician charges $30 for a service call, plus $75 per hour of service. If he charged $210, how many hours did he work? 8. Mark used his debit card to buy groceries for $87 on Saturday and gas for $41 on Sunday. If his bank account balance is now $542, what was his starting balance on Saturday? 10. The area of a square is 225 square feet. Find the side length of the square. 13. Ariana plans to use $260 less than three- fourths of her savings to buy a car. If the purchase price of the car is $9,340, how much does she have in savings? 12. To attend the football game, it costs $8 for parking plus $59 per ticket. If Bryan paid $362, how many tickets did he purchase? hoth numbers. 14. A kite has four equal sides. If 5 inches is added to each side, the new perimeter will be 56 inches. Find the side length of the original kite. Equations) robler O Gina Wilson (All Things Algebra, LLC), 2016
Transcribed Image Text:7. Four-fifths of the senior class went to prom. If 324 seniors went to prom, how many are there in the senior class? 31 9. Lee filled up his gas tank before starting a road trip. If he has used 5.8 gallons two hours into the trip, and has 12.4 gallons remaining, how many gallons of gas did he start with? 11. An electrician charges $30 for a service call, plus $75 per hour of service. If he charged $210, how many hours did he work? 8. Mark used his debit card to buy groceries for $87 on Saturday and gas for $41 on Sunday. If his bank account balance is now $542, what was his starting balance on Saturday? 10. The area of a square is 225 square feet. Find the side length of the square. 13. Ariana plans to use $260 less than three- fourths of her savings to buy a car. If the purchase price of the car is $9,340, how much does she have in savings? 12. To attend the football game, it costs $8 for parking plus $59 per ticket. If Bryan paid $362, how many tickets did he purchase? hoth numbers. 14. A kite has four equal sides. If 5 inches is added to each side, the new perimeter will be 56 inches. Find the side length of the original kite. Equations) robler O Gina Wilson (All Things Algebra, LLC), 2016
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