exam Maths Puzzle Numerical Ability

from the info in the table evaluate (f of g)^-1 (2)

X 1 2 3 4 5
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F(X) 3 4 5 1 2
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G(X) 5 4 2 3 1

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exam Other Question

I am having a hard time trying to solve this problem, if anyone could help me step by step, thank you.

Power rule for integral exponents:

(3y to the eighth power) divided by (2zy to the second power)
Isaac is nine years older than Kylie. Isaac is four times as old as Brian was three years ago. Brian is eighteen years younger than Isaac. How old is Kylie?