Rewrite the equation in a rotated x'y'-system without an x'y' term. Express the equation involving x' and y' in the standard form of a conic section.4x2 - 4xy + y2 - 6x + 12 = 0
A. 
+ y'2 = 1
B. 
+ 
= 1
C. 
2 = 
x' - 
D. y'2 = -6x'
Answer: C
Mathematics
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feet and a width of 
feet. What is its perimeter?
A. 5
ft
B. 10
ft
C. 10
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