exam Maths Puzzle Numerical Ability

Simplify completely: (s2/tu) * (5t3u/6s)

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exam Other Question

please help me with this problem:
for the following inequality:x-y<-4
list three ordered pair solutions for the boundary of this inequality Sam is on a train traveling south at 34 mph. He spots a second train traveling east at 23mph and records it takes 18 seconds for the 2nd train to pass. How long in feet is the second train?