Fill in the missing term in the pair of equivalent ratios 5: 6 = 45: __

45 ÷ 5 = 9
so you would take 6 and multiply it by 9
so you would get 54 as you answer

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.

Ais the correct answer