exam Maths Puzzle Numerical Ability

I need help could you show me how to do this problem

Graph the solution set of x > 2

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exam Other Question

Find all positive values for k for which the following can be factored.

x^2+x-k

I have no clue what to do with this......can you please help me? Thank you! Assume that y varies inversely as x. If y = 8 when x = 2.5, find x when y = 2.