Factor.42x3 + 18x2 + 49x + 21
A. (7x2 - 7)(6x + 7)
B. 42x(7x2 + 3x + 10)
C. (6x2 - 7)(7x - 3)
D. (6x2 + 7)(7x + 3)
Answer: D
Mathematics
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Solve the problem.Ellen wishes to mix candy worth $2.43 per pound with candy worth $6.50 per pound to form 51 pounds of a mixture worth $5.62 per pound. How many pounds of the more expensive candy should she use? Round your answer to the nearest pound, if necessary.
A. 45 pounds B. 13 pounds C. 11 pounds D. 40 pounds
Mathematics
Evaluate.(-7)3
A. 21 B. 343 C. -21 D. -343
Mathematics
Write the sum or difference as a product containing only sines and/or cosines.sin(2?) - sin(4?)
A. -2 sin ? cos(3?) B. 2 sin(3?) cos ? C. 2 cos(2?) cos(3?) D. -2 sin ?
Mathematics
Perform the indicated operation and simplify.
- 
A. 
B. 
C. 
D. 
Mathematics