book Maths Puzzle Numerical Ability

You have $24.05 with 210 coins in quarters, nickels and dimes, such that twice the number of quarters is 13 more than the number of nickels. find how many of each coin you have.

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book Other Question

A plane flies 700 miles against a steady 20-mi/h headwind and then returns, with the wind, to the same point. If the entire trip took 12 hours, what was the speed of the plane in rational function- h(x)=8x/(x-3)(x+7)

If it is a polynomialfunction or not f(x)=4x+5x^3

oblique asymptote f(x)=2x^3+11x^2+5x-1/x^2+6x+5

domain of the function g(x0=x/x^2-8