Multiply.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: E
Mathematics
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Solve the problem.A boat heads upstream a distance of 30 miles on the Mississippi river, whose current is running at 5 miles per hour. If the trip back takes an hour less, what was the speed of the boat in still water? Give the answer rounded to two decimal places, if necessary.
A. 18.03 mph B. 6 mph C. 15 mph D. 16.58 mph
Mathematics
Find the real solutions of the equation.
+ 
= 3
A. {4}
B. {1}
C. {
}
D. no real solution
Mathematics
Solve the problem.Let v1 = 
, v2 = 
, v3 = 
. Determine if the set {v1, v2, v3} is linearly independent.
A. No B. Yes
Mathematics
Simplify the expression using the order of operations. Write the answer as an improper fraction where appropriate.7 - 6[7 - (2 + 7)]
A. -65 B. 19 C. 12 D. -2
Mathematics