exam Maths Puzzle Numerical Ability

let f(x)=2x+1 and g(x)=3x to the power of 2. find FoG

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exam Other Question

I am really having trouble with these!

4th root 10x^2 (numerator)
15xy^3 (denominator)

What is done first, simplify the fraction? 2x (num) 3y^3 (denom)???? Find the quotiet. Write your answer using only positive exponets.

10^-4 divided by 10^5