9th grade algebra help?

Question

first day of 9th grade math. perfect. i need a little help with how to do unit analysis. i know that you find the number first, then i get confused.

the things says to find the average speed for the given distance and time. show unit analysis.

...a train travels 75 miles in 55 minutes....

please help me!

[and btw i dont want people to do my homework for me. i've already done about 50 problems. i just need help understanding what it means]

Answer 1

Well if you don't want me to do the problem for you, what the problem is basically saying is that you need to find how many miles per hour the train was traveling at. So if it traveled 75 miles in 55 minutes, how many would it travel in 60 minutes?

Set up the equation like:

75/55 = x/60

Get ittt???

Answer 2

Do this

75/55= 1.3636

multipy by 60

and your answer is 81.81 (82) MPH

Answer 3

Set it up as a proportion to turn it into MPH then cross multiply and solve for x