exam Maths Puzzle Numerical Ability

if y varies directly with x, and y=44 when x=4 find the constant of variation k

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exam Other Question

Given f(x) = 3 x+8 and g(x) = sqrt(x+3), find f � g(4) and g � f(4), giving exact answers (using sqrt if necessary). can you please help me simplify by dividing: (((x(3)=2x(3)-6 over x-1)))