exam Maths Puzzle Numerical Ability

Assuming no denominator equals 0 and that x and y are intergers greater than 1, simplfy the following fraction: yxsquarem over ym-1n

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exam Other Question

Saving for Dream Vacation. Kimberly makes $8,000 more a year than her husband. Kimberly saves 10% of her salary for vacation, her husband saves 8%. Together the saved $5,660 per year. How much does Kimberly and her husband make? how can i know just by looking at any two matrices if their product is commutative?