exam Maths Puzzle Numerical Ability

determine the correct half-plane in each case and complete the graph
4x+y>4 (the symbol > has an underline)

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exam Other Question

3 radical 2 divided by 2-5 radical 2; Simplify by rationalizing the denominator. 7/x+2+5/x^2-2x+4=84/x^3+8