exam Maths Puzzle Numerical Ability

(4x^8)(4x^-3)

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exam Other Question

-x^2 y^2/ x^1/2 y^0 please help simplify i have no idea how to do this!! Sue travels 5mph less than twice as fast as June. Starting at the same point and traveling in the same direction, they are 80 miles apart after 4 hours. Find their speeds.