Solve the equation on the interval 0 ? ? < 2?.2 cos2 ? - 1 = 0
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Evaluate the binomial coefficient.
A. 140 B. 1680 C. 70 D. 35
Mathematics
Solve the problem.The solution set of the inequality 
is 
. Without doing any work, give the solution to 
A. (-?, -3) ? (-2, ?) B. (-3, ?) C. [-3, -2] D. (-3, -2)
Mathematics
Change the mixed number to an improper fraction.4
A. 
B. 
C. 
D. 
Mathematics
Solve.Nicole can buy a motorbike for $2047 or a car for $9874. Round each price to the nearest hundred to estimate the difference in the prices of the two vehicles.
A. $7900 B. $8000 C. $7800 D. $7827
Mathematics