exam Maths Puzzle Numerical Ability

Please help!

Graph the solutioin to the system of inequalities y>-4/3x+8
y<=2/3x+1

Thank you!!

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exam Other Question

The bank loans you $6000 at 12% interest for 6 months. Find the total amount due on the loan. I have the following problem:

If 2f(x)+f(1-x)=x2(this should be "x-squared"), what is f(x)?

The answer is f(x)=1/3x2+2/3x-1/3. But how in the world do you get to this answer