Use a system of linear equations to solve the problem.Julie and Eric row their boat (at a constant speed) 16 miles downstream for 2 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 8 hours. Find the rate of the current.
A. 5 mph
B. 3 mph
C. 4 mph
D. 2.5 mph
Answer: B
Mathematics
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Solve the problem.If the series 
is integrated twice term by term, for what value(s) of x (if any) does the new series converge and for which the given series does not converge?
A. x = -2 B. x = -4, x = -2 C. x = -4 D. None
Mathematics
Simplify. Assume that no radicands were formed by raising negative quantities to even powers.
A. 
B. 
C. 
D. 
Mathematics
Add the real numbers. Write any improper fraction as a whole or mixed number where appropriate.4 + 3
A. 4 B. 7 C. 8 D. 3
Mathematics
Perform the indicated operations and simplify.
A. 
B. 
C. 
D. 
E. 
Mathematics