Question 551051
The buses are converging at their combined speed:  42+33 = 75 miles/hr.
When they meet, they will have covered the entire distance:  792 miles.
The fundamental distance equation is:  d = r*t
We know 'd' and 'r', so we can solve for 't'.
t = 792 miles / 75 miles/hr = 10.56 hr.
.56 hr * 60 min/hr = 33.6 min.
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We now have to arrange these facts to answer the question:  How far from Key West will they be?
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Well, the bus that left Key West was going 42 mph * 10.56 hr = 443.52 miles.
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We can check the distance based on leaving Pensacola.
That bus traveled 33 mph * 10.56 hr = 348.48.
That is how far from Pensacola they are.  We know the distance from Pensacola to Key West is 792,
so the bus is 792 - 348.48 = 443.52.
That's confirms the answer since it matches the other distance.
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Answer:  The buses are 443.52 miles from Key West when they meet.
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Done.