Jessica and Jonathan do some research to gather all their ingredients and figure out their costs. As shown in the table below, they will use 6 containers of lemon juice, which each contain 0.75 cup of juice.

What is the total volume of lemon juice they will use in their recipe, in cups?

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.

Ya i could just need to know what type of math