Solve the equation (x in radians and ? in degrees) for all exact solutions where appropriate. Round approximate answers in radians to four decimal places and approximate answers in degrees to the nearest tenth.4 sin2 x - 1 = 0
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Perform the indicated operation. Simplify, if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
Use proportions to solve the problem.If a computer prints 8.8 lines in 4 seconds, how many lines can it print per minute?
A. 132.5 lines B. 132 lines C. 133.5 lines D. 133 lines
Mathematics
Solve the problem.The long jump record, in feet, at a particular school can be modeled by 
where x is the number of years since records began to be kept at the school. What is the record for the long jump 
after record started being kept? Round your answer to the nearest tenth.
A. 26.9 feet B. 27.0 feet C. 27.1 feet D. 21.5 feet
Mathematics
Determine whether the ordered triple is a solution to the given linear system.(-2, 6, -1)
A. Yes B. No
Mathematics