How do I solve 1/2z=9 1/4?

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?