Find all the first order partial derivatives for the following function.f(x, y) = xye-y
A. 
= ye-y; 
= xe-y(y - 1)
B. 
= ye-y; 
= - xye-y
C. 
= ye-y; 
= xe-y(1 - y)
D. 
= ye-y; 
= xe-y
Answer: C
Mathematics
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Add or subtract as indicated.-0.39 - (0.36)
A. -0.75 B. -0.1404 C. 0.13 D. 0.03
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Graph the line containing the given pair of points and find the slope. (1, 7) (0, 0) 
A. 
B. -7
C. 7
D. - 
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Express the sum using summation notation. Use a lower limit of summation, not necessarily 1, and k for the index of summation.
+ 
+ 
+ 
+ . . . + 
A. 
B. 
C. 
D. 
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Fill in the blank with one of the words listed below.
To find an x-intercept of a graph, let 
= 0.
A. y B. x C. y-intercept D. x-intercept
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