Find the exact value by using a sum or difference identity.sin (115°) cos (55°) - cos (115°) sin (55°)
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Multiply.(4
- 7
)2
A. 16x - 56
+ 49y
B. 16x - 56xy + 49y
C. 16x + 28
+ 49y
D. 16x + 49y
Mathematics
Solve the problem.A machine can fill 702 cartons of milk in 0.1 hour. How many cartons of milk can it fill per hour?
A. 3510 cartons/hour B. 7020 cartons/hour C. 702 cartons/hour D. 70 cartons/hour
Mathematics
Rationalize the denominator. Assume variables represent non-negative values.
A. 
B. 
C. 6y
D. 6
Mathematics
Find the standard deviation of the data summarized in the given frequency table.A company had 80 employees whose salaries are summarized in the frequency table below. Find the standard deviation. 
A. 8600.4 B. 7963.3 C. 8361.5 D. 8839.3
Mathematics