Bruno recorded 9 songs on his recent album. the total length of the album is 57 minutes. find a unit rate to represent the average length per song on the album round to the nearest hundredth?

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

2.4+3.2t. you get the answer by adding the ones with variables and ones without