Find fx(x, y).f(x, y) = xye-x
A. ye-x(1 - x)
B. y(e-x - x)
C. e-x(1 - x)
D. -ye-x
Answer: A
Mathematics
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Determine whether 149,857 is divisible by 4. ?
A. yes B. no
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Find the center of mass of a thin plate covering the given region with the given density function.The triangular region cut from the first quadrant by the line y = -x + 1, with density ?(x) = x
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
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Add.7 + (-15)
A. -8 B. 8 C. -22 D. 22
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Graph the system of inequalities, and find the coordinates of the vertices.3y + x ? -6,y + 2x ? 8,y ? 0,x ? 0
A. 
B. 
C. 
D. 
Mathematics