PLEASE HELP ASAP
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[15 points, algebra 2]simplify the complex fraction and find the restrictions.

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?

Keith runs 5 miles in 38 minutes. at the same rate, how many miles would he run in 57 minutes