Find the average value of 
over the given region.
over the cube in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 15
B. 450
C. 90
D. 75
Answer: A
Mathematics
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A student can afford to spend up to $370 on a stereo system and some compact discs. If the stereo costs $155 and the discs are $9.50 each, find the greatest number of discs he can buy.
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Solve for x. Check your answers.4 - 3 = x - 15
A. x = -14 B. x = 16 C. x = -8 D. x = 22
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Solve the inequality.x2 - 25 > 0
A. (-25, 25) B. (-?, -5) or (5, ?) C. (-?, -25) or (25, ?) D. (-5, 5)
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Perform the indicated operation and simplify.
- 
A. 
B. 
C. 
D. x + 3
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