exam Maths Puzzle Numerical Ability

Please help me solve the following problem:

(x^6y^-4/2x^-3)^-3 (x^-3y^2/x^3y^-3)^2

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exam Other Question

Find the slope of the graphed lines of 0 ,1, -2 and undefined. HUH? I dont get it. Michelle is selling her condo. She needs to make at least $42,000 from the sale so she can make a down payment on a new house. If a 5.5% real estate commission is deducted, what is the lowest offer Michelle should accept to get her down payment?