Find the inverse, if it exists, for the matrix.
A. 
B. 
C. 
D. The inverse does not exist.
Answer: A
Mathematics
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Find the indicated partial derivative.
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Mathematics
Solve the problem.A barge travels along a river between Metro City and Smithport, which are 65 miles apart. The speed of the current is 1.6 mph. If the barge can make the downstream trip in 6.2 hours less than it can travel the upstream trip, then what is the barge's speed in still water? Round your answer to one decimal place.
A. 6.0 mph B. 7.5 mph C. 4.6 mph D. 8.3 mph
Mathematics
Simplify the expression.
?
What will be an ideal response?
Mathematics
Add the integers.-64 + (-47)
A. -112 B. 111 C. 112 D. -111
Mathematics