System of Linear Equations
Calvin went to Chicago's Magnificent Mile to do some Christmas shopping. At the first store, he bought some t-shirts and spent half of his money. At the second store, he bought a stuffed bear and spent half of his remaining money. For lunch, he bought a sandwich for half of his remaining money. He then had $10 left to take the train home. How much money did Calvin bring along at the start of the day?
A group of friends are planning a road trip. If they all contribute $24, then they would be $6 short of the total cost of the trip. If they all contribute $25, then they would have $3 more than the total cost of the trip. What is the total cost of the trip?
Stella the school teacher is bringing 38 of her students out on a field trip. The bus that contains her students has 25 rows of seats, and each row contains 2 seats. When taking attendance on the bus, she notices there was no empty row of seats. How many rows of seats have exactly 1 student in them?
Susan's backyard has three faucets: , and . If she turns on all three of them, it takes minutes to fill the pool. If she turns on only and , it takes minutes, and if she turns on only and , it takes minutes. If she turns on only and , how long will it take (in minutes) to fill the pool?
A candy store sells almonds for $ per kilogram and peanuts for $ per kilogram. If it sells kilograms of mixed nuts for $ per kilogram, how many kilograms of almonds are in the mixed nuts?