exam Maths Puzzle Numerical Ability

My least favorite because I do not understand these:(
What is the focal point of 1/3(y-2)=2(^-x+5)

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exam Other Question

Hi. Can you help me with this problem and finding the medians?

A median is a line segment from a vertex to the midpoint of the opposite side. Find the lengths of the medians of g(x)=x=5;h(x)=x-5 , are these functions inverse if so, why?