exam Maths Puzzle Numerical Ability

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The width of a rectangle is 4ft. less than the length. The area is 5ft^2. Find the length and the width.

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exam Other Question

I am having difficulty with functions, can someone please help. Determine which functions are inverse to each other. f(x)=6x, g(x)=x/6, h(x)=6/x
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hi i really dont understand what to do for this equation please help me out. thanks i apreciate it.

(16x) over (25x^2-5) times ( 2x^2-x-1) over(8x)