Roman paid $150 to join a handball club. he pays additional $15 every time he uses one of the club's handball courts. write an equation that describes roman's total cost for playing handball as a function of the number of times he plays

You’re ordering more thread for blue jeans co. you usually purchase from ted’s threads, which sells 12 thread spools for $27. you recently received a notice from wade's wares that says you can buy thread from them for $2.30 each for the first 2 dozen and $2 a spool thereafter. you need to order 5 dozen spools. what percentage can you save by going with wade’s wares?