Find the second-order partial derivative.Find fxx when f(x, y) = x4y5 - 
x7y7 + 17x - y.
A. 12x2y5 - 42
x5y7
B. 12x3y5 - 42
x6y7
C. 12x2y4 - 42
x5y6
D. 3x2y5 - 6
x5y7
Answer: A
Mathematics
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A. 
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B. 
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C. 63/4
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A. 
B. 
C. 6
D. 
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Find the perimeter of the figure.A concrete curb is to be built around a parking lot. How many meters of curbing will be needed?
A. 1680 m B. 104 m C. 208 m D. 188 m
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The following function may be viewed as a composite function f(g(x)). Find f(x) and g(x). 
A. f(x) = x2 + 2x - 3
g(x) = 
B. f(x) = 
g(x) = 
C. f(x) = 
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D. f(x) = x
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