Perform the operation and give the answer as a fraction in lowest terms.
- 
A. 
B. 
C. 
D. 
Answer: D
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Find all the second order partial derivatives of the given function.f(x, y) = x2 + y - ex+y
A. 
= 2 + ex+y; 
= ex+y; 
= 
= ex+y
B. 
= 2 - y2ex+y; 
= -x2ex+y; 
= 
= - y2ex+y
C. 
= 1 - ex+y; 
= - ex+y; 
= 
= -ex+y
D. 
= 2 - ex+y; 
= - ex+y; 
= 
= -ex+y
Find the mean.Jill kept track of the number of hours she spent exercising each week. The results for four months are listed below. Find the mean number of hours Jill spent exercising per week. Round your answer to one decimal place if necessary. 6.7 7.4 7.5 8.6 7.3 6.7 8.7 7.5 8.2 6.7 8.6 8.3 8.8 7.4 7.4 8.2 7.3 8.7
A. 7.4 B. 7.8 C. 8.0 D. 8.2
Find the sum or difference.(7n6 - 9n + 2n3) + (7n3 + 6n6 - 4n)
A. -3n6 + 14n3 - 2n B. 9n10 C. 13n + 9n6 - 13n3 D. 13n6 + 9n3 - 13n
For f (x) = 
? x , find the simplified difference quotient.
What will be an ideal response?