Find the opposite (additive inverse).- 
A. 
B. - 
C. - 
D. 
Answer: D
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Find the average value of the function f over the region R.f(x, y) = sin 
(x + y)R: 0 ? x ? 
, 0 ? y ? 
A. 
B. ?2
C. 
D. 4?2
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. 8.2 B. 7.8 C. 7.4 D. 8.0
Solve the system of equations by Gauss-Jordan elimination.
A. {(-1, -4, -2)} B. {(-4, -2, -1)} C. {(-1, -2, -4)} D. ?
Suppose that the function with the given graph is not f(x), but f'(x). Find the open intervals where f(x) is increasing or decreasing as indicated. Decreasing
A. (-?, -1), (-1, 2) B. (-1, 2) C. (-?, 2) D. (-?, 2)