Solve the equation for exact solutions over the interval [0, 2?).cos2x + 2 cos x + 1 = 0
A. 
B. 
C. {?}
D. {2?}
Answer: C
Mathematics
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Solve the problem.When the temperature is 39°F, what is the temperature in degrees Celsius? Round your answer to the nearest tenth if necessary.
A. 102.2°C B. 3.9°C C. 38.2°C D. 10.3°C
Mathematics
Solve.5x3 + x2 - 5x - 1 = 0
A. -1 , 5
B. 1 , 
C. 1 , -1 , - 
D. 1 , -1
Mathematics
Rewrite with positive exponents, and simplify, if possible.
A. p3/4
B. - p3/4
C. p4/3
D. - 
Mathematics
Convert the angle to a decimal in degrees. Round the answer to two decimal places.322°58'59''
A. 322.99° B. 322.94° C. 323.04° D. 322.98°
Mathematics