book Maths Puzzle Numerical Ability

The revenue R for a jazz concert is given by the equation R=-1/500(x squared-5500x) where x is the number of tickets sold. Determine the number of tickets that will yield maximum

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This is the question: Jane has 132 more marbles than Mary has. If their mother gives 25 marbles to each of them, Jane will have 5 times as many marbles as Mary.How many marbles doe Simplify the following. (3x^2+sx+4)(-5x^3-x+3) (3n^5w)^2/(n^3w)^6 (6y-5)^2

9c^7w^-4(-d^2)/15c^3w^6(-d)^2 5m^-3/6^-1m^-2 (7x-5y)(2x+9y)