two trains leave the station at the same time one is heading east and the other one is heading west the eastbound train travels at a rate of 45 miles per hour the westbound train travels at a rate of 55 miles per hour how long will it take for the two trains to be 280 miles apart

Which of these choices show a pair of equivalent expressions?

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need