Find the function value.Let f(x) = 5x. Find f(-3).
A. -15
B. - 
C. 
D. 
Answer: C
Mathematics
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Use an Euler diagram to determine whether the argument is valid or invalid.All dogs are animals.
Therefore, some dogs are pets.
A. valid B. invalid
Mathematics
Write an equivalent double integral with the order of integration reversed.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A barge takes 6 hours to move (at a constant rate) downstream for 60 miles, helped by a current of 2 miles per hour. If the barge's engines are set at the same pace, find the time of its return trip against the current.
A. 120 hours B. 10 hours C. 6 hours D. 8 hours
Mathematics
The function Y2 is defined as Y1 + k for some real number k. Based upon the given information about Y1 and Y2, find k.
A. 4 B. -2 C. -3 D. 5
Mathematics