exam Maths Puzzle Numerical Ability

Simplify using rules of exponents
#26.
(2x^-1y^2)^-3

#38.
(-2y^2/x)^-3
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exam Other Question

What is a discontinuity in relation to Algebra 2 if a plane is travelling 3100 km at 790km/h and then encounters a tailwind that boosts its speed tp 990km/h for the next 2800km. what was the total time for the trip?what was teh average speed of the plane for this trip?