exam Maths Puzzle Numerical Ability

What are the steps to solving this equation?

x^-3 + y ^-6
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x^-6 y^2

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exam Other Question

An employee who produces x units per hour earns an hourly wage of y = 0.85x + 12 (in dollars). Find the hourly wage for an employee who produces 14 units per hour. cedric wants to buy one of four diffrent kinds of new shoes. each brand of shoe is avalible in two colors, black and white. how many diffrent shoe choices does cedric have?
i hope you can help
thanks a bunch!