book Maths Puzzle Numerical Ability

Nicole has $3.15 in nickles, dimes and quarters. She has 3 more nickles than quarters and two times as many dimes as quarters. How many coins of each kind does she have? Show Equation.

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book Other Question

Interest on late property taxes is 16% per year compounded monthly. Find the total to be paid for the $1,700 tax and 10 months late. Round the answer to the nearest cent.
How do What is the completely factored form of 25x^4-4x^2?