What is the completely factored form of x^2-16xy + 64y^2? O xy(x -16 +64y)
O xy(x + 16 +64y)
O (x-8y(X– 8y)
O (x+8y)(x + 8y)

Grading scale 1 has the following weights- (tests- 50% quiz- 25% homework- 15% final exam- 10%). calculate your final average if your performance in the class is as follows-test grades- {88, 84, 90, 75, 70, 81); quiz grades- {88, 67, 90, 90, 45, 99, 76, 98, 100}; homework- 90; final exam- 75