Acar goes from point a to point b, five miles away and then returns to point a. the car is going 15 mph. what is the velocity of the car? a. -30 mph b. 0 mph c. +15 mph d. +45 mph

I think it is b because he went back so there is no velocity

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.