Can someone please help me answer this one question plz

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.