Multiply and simplify.-6z ? 
A. 0
B. 36z
C. 1
D. -1
Answer: C
Mathematics
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Write the expression in terms of sines and/or cosines, and then simplify.sin2 x + sin x - 1 + cos2 x
A. 
B. 
C. 
D. sin x
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics
Find fraction notation for the percent notation in the problem.Sales of a particular product increased 45% over last year's sales of the product.
A. 
B. 
C. 
D. 
Mathematics
Use the given vectors to find the specified scalar.u = -14i + 5j and v = 10i - 8j; Find u ? v.
A. -180 B. -100 C. -40 D. -140
Mathematics