1. Maria cannot remember what she scored on the second test but she knows that the sum of the three tests is 270 write and solve an addition equation to determine what she scored on her second test​

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?