exam Maths Puzzle Numerical Ability

help please!! THANKS!

simplify :

(x^0y^2)^-2y^5x / x^2x^-5yy^-3

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exam Other Question

A garden supply store sells two types of lawn mowers. Total sales of mowers for the year were $8379.70. The total number of mowers sold was 30. The small mower cost $249.99. The large mower costs $329.99. Find the number sold of each type of mower. why is it that a negative plus a negative equal a positive