exam Maths Puzzle Numerical Ability

simplify
(-9x^2y^4)(2x^3y^2/3x^5y^7)

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exam Other Question

teh product of $25 and the number m of club memberships is greater than or equal to $500 Solve the following system of equations. If the system cannot be solved, state that it cannot be solved and explain why.

5x-2y=(-24)
-4y= -48-10x