Mario spent $40.18 on 3 music cd's. the sales tax was $2.33 mario also used a coupe for $1.00 off his purchase. how much did each cd cost

I think the answer is 10.92

12.28333333333333 Because 40.18
2.33
-1.00 =36.85 divided by 3 is 12.28333333333333

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

hope it is correct if not i'm srry i tried to