The cost c (in dollars) for the fuel and maintenance of a go-cart is given by c=9x+1500, where x is the number of rides. It costs $34 per ride. How many rides does it take to break even?

If the measure of xyz is 81 what is the measure of yz

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?