A jewelry store has 54 pieces of jewelry for sale, and 21 of them are key chains. What is the probability that a randomly selected piece of jewelry will be a key chain?

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made