book Maths Puzzle Numerical Ability

if you have 40 coins, all nickles and quarters and n represents the number of nickels, what would represent the number of quarters?

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book Other Question

i need help dividing polynomials here are a couple problems 4x^3 - 8x^2 + x + 3/ 2x-3

#2 2-13x +24x^2 -3x^3 18x^4 / 1-3x marisa find the altitude of the triange of the points: A(-2,1) B(4,0) C(5,0), with AB being the base.