exam Maths Puzzle Numerical Ability

Simplfy:

assume that all variables are non negative real numbers

5th square root of -243x^30y^31=

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exam Other Question

find the slope of the line passing through points [-5,-3] and [-2,6] A steamboat travels 8 km/h faster than a freighter. The steamboat travels 88 km in the same time the freighter travels 53 km. Find the speed of the steamboat.