book Maths Puzzle Numerical Ability

Hello, I"m not sure if this is the right topic for this but how do you tell what property or like reflexive, substitution, transitive, and so on how can you tell what you use for e

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If they give you a problem that said dreaw on the number like that flooling set [-2,7) upside down U [5,10]
what does the u or upside down u mean
A bus leaves a station at 1 P.M., traveling west at an average rate of 44mi/h. One hour later a second bus leaves the same station, traveling east at a rate of 48 mi/h. At what time will the two buses be 274 mi apart?