Express the given quantity in terms of sin x or cos x.sin 
A. cos x
B. sin x - cos x
C. -cos x
D. -cos x - sin x
Answer: C
Mathematics
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Solve.Bob owns a watch repair shop. He has found that the cost of operating his shop is given by 
where c is the cost in dollars, and x is the number of watches repaired. How many watches must he repair to have the lowest cost?
A. 68 watches B. 34 watches C. 30 watches D. 32 watches
Mathematics
Find the sum, if it exists.
A. 
B. 
C. 
D. Does not exist
Mathematics
Decide whether or not the functions are inverses of each other.
A. No B. Yes
Mathematics
Find the product, and write in lowest terms, if necessary.- 
? 
A. - 
B. 
C. - 
D. 
Mathematics