Acash register contains $10 bills and $20 bills with a total value of $340. if there are 23 bills total, then how many of each does the register contain?

Cam bought some used books for $4.95. he paid $0.50 each for some books and $0.35 each for the others. he bought fewer than 8 books at each price. how many books did cam buy?

Under normal conditions, 1.5 feet of snow will melt into 2 inches of water. during a winter season high in the mountains, 301 feet of snow fell. how many inches of water will there be when the snow melts?

Which one ? is the answer and how to find this answer