Rationalize the denominator.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find all solutions of the equation.2 cos x - 1 = 0
A. x = 
+ n? or x = 
+ n?
B. x = 
+ n? or x = 
+ n?
C. x = 
+ 2n? or x = 
+ 2n?
D. x = 
+ 2n? or x = 
+ 2n?
Mathematics
Plot the number in the complex plane.6 - i
A. 
B. 
C. 
D. 
Mathematics
A Mississippi riverboat can travel 75 kilometers downstream in three hours and can make the return trip in five hours. Find the speed of the boat in still water. ?
A. 30 kph B. 40 kph C. 20 kph D. 25 kph E. 21 kph
Mathematics
Factor the sum or difference of cubes. c3 + d3
A. (c + d)(c2 - cd - d2) B. (c + d)(c2 - cd + d2) C. (c - d)(c2 - cd + d2) D. (c + d)(c2 + d2)
Mathematics