Simplify the expression.
A. 9
B. 3
C. 5
D. not a real number
Answer: B
Mathematics
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Find all the second order partial derivatives of the given function.f(x, y) = x ln (y - x)
A. 
= 
; 
= - 
; 
= 
= 
B. 
= 
; 
= - 
; 
= 
= 
C. 
= 
; 
= - 
; 
= 
= - 
D. 
= 
; 
= 
; 
= 
= 
Mathematics
Express the area of the region bounded by the given line(s) and/or curve(s) as an iterated double integral.The lines 
, 
, and 
A. 
B. 
C. 
D. 
Mathematics
Tell which integer corresponds to the situation.Finding 5 cents
A. -5 B. 5
Mathematics
Solve. Round your answer to three decimal places if necessary.7x + 1 = 42
A. 6.273 B. 2.921 C. 0.921 D. 1.921
Mathematics