Solve the problem.Julie and Eric row their boat (at a constant speed) 45 miles downstream for 5 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 9 hours. Find the rate of the current.
A. 1.5 mph
B. 7 mph
C. 2 mph
D. 3 mph
Answer: C
Mathematics
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Find the x- and y-intercepts of the line y = 2x + 6 .
A) (–5, 0), (0, 7) B) (0, –5), (7, 0) C) (–3, 0), (0, 6) D) (–5, 0), (0, –7) E) (–3, 0), (0, –6)
Mathematics
Find the real solutions of the equation.
= x
A. {-4, 10}
B. 
C. {10}
D. no real solution
Mathematics
Prepare a probability distribution for the experiment. Let x represent the random variable, and let P represent the probability.Three coins are tossed, and the number of heads is noted.
A. 
B. 
C. 
D. 
Mathematics
Solve for the indicated variable.I = 
, for n
A. n = 
B. n = 
C. n = 
D. n = IR(Ir - E)
Mathematics