Write the product as a sum or difference containing only sines or cosines.sin(4?) cos(5?)
A. 
[cos(9?) + sin ?]
B. sin cos(20?2)
C. 
[cos(9?) - cos ?]
D. 
[sin(9?) - sin ?]
Answer: D
Mathematics
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Round the number as indicated.308 to the nearest ten
A. 410 B. 300 C. 310 D. 320
Mathematics
Solve the problem.A rectangular enclosure must have an area of at least 2700 yd2. If 240 yd of fencing is to be used, and the width cannot exceed the length, within what limits must the width of the enclosure lie?
A. 0 ? w ? 30 B. 30 ? w ? 60 C. 30 ? w ? 90 D. 60 ? w ? 90
Mathematics
Using the given coordinate, find the other coordinate that makes the ordered pair a solution of the equation.6x + y = -39, (0, 
)
A. -39 B. -7 C. -45 D. -234
Mathematics
Solve the system by substitution.x - 7y = 6 x = 8y
A. {(6, 48)}
B. {(-48, -6)}
C. 
D. {(48, 6)}
Mathematics