Plz Help you don't need to answer all just sum of them

Which expression is equivalent to 5r6141 2r+st6

Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?

How do you convert 1.27 to a percentage