Add or subtract as indicated. Write the answer in simplest form.
+ 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Use an identity to write the expression as a single trigonometric function or as a single number.sin 8x cos 8x
A. 2 sin 4x
B. cos 4x
C. 
sin 16x
D. cos 8x
Mathematics
Find the indicated term of the arithmetic sequence.
, 
, 
, . . . ;20th term
A. - 
B. - 1
C. - 
D. - 
Mathematics
Express the sum using summation notation. Use a lower limit of summation not necessarily 1 and k for the index of summation.
+ 
+ 
+ 
+ . . . + 
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated conversion within American units of length.30 in. = 
ft
in.
A. 1 ft 18 in. B. 2 ft 11 in. C. 2 ft 6 in. D. 6 ft 2 in.
Mathematics