book Maths Puzzle Numerical Ability

To: xcentaur(44)
e.g. Find the solution set.
x^2+ y^2 = 8, and 16x + 4y^2 = 80

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Hi
I'm really stuck on this problem. Someone please help me solve it because i have this assignment due soon. Thanks
Write the fraction as a sum of terms.
{x^2-4x+2/x}. I don't The grades are given for a student for a particular semester. Find the grade point average. Assume the grade point values are A = 4, B = 3, C = 2, D = 1, and F = 0. Round to the ne