exam Maths Puzzle Numerical Ability

Use given functions to find all values of x that satisfy the required inequality?
f(x)=4x^2 g(x)=9x-2; f(x)< g(x)

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10(x-7)-3x=x+2 I need help answering the questions about the diagram of the triangle. They are asking what I can conlcude about the triangle and it's angles.