?Which of the following does not involve subtraction to solve or model?
?
A. ?The distance between -7 and -11.
B. ?X decreased by Y.
C. ?-7 + (-9)
D. ?A number decreased by 4.
E. ?The range of temperatures on any particular day.
Answer: C
Mathematics
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Express the product as a sum containing only sines or cosines.2 cos(7?) cos ?
A. cos(14?) + cos(2?) B. cos(8?) + sin(6?) C. cos(8?) + cos(6?) D. cos(10?) + sin(4?)
Mathematics
Find the reciprocal.
A. 
- 
B. 
C. 
D. 4(a - b)
Mathematics
Determine which ordered pair is a solution of the system.
A) (–6, 5)
B) (5, 6)
C) (2, –1)
D) (–2, –1)
E) (–1, –2)
Mathematics
Find the LCM of 6 and 9.
A. 18 B. 24 C. 4 D. 54
Mathematics