A chef has 6 blocks of butter. Each block weighs 1 pound. She cuts each block into fifths. How many15-pound pieces of butter does the chef have? The chef has one-fifth-pound pieces of butter.

200 miles.45 x 3 (charge per day times days)135$205$ - 135$ = 70$0.35x = 70divide both sides by 0.35200

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.