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Maths Puzzle
Numerical Ability
Don has 80 coins. He has 4 times as many dimes as nickels and the remaining are pennies. With a single variable, express the number.
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book Other Question
x²+2x/x²+4x+4
Please help me figure out this function.
Let f(x)=x-(2/x), Determine f(3) and f(a+b)
Thanks
Renee