Perform the indicated operation.Subtract. 2a4 + 8a3
A. 9a4 - 4a3
B. 15a7
C. -5a4 + 20a3
D. -5a4 - 4a3
Answer: C
Mathematics
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Simplify the radical expression by factoring out the largest perfect nth power. 
A. 4
B. 2
C. 2 + 
D. Not a real number
Mathematics
Write the fractions that represent the shaded and unshaded portions of the given figure.
A. 
, 
B. 
, 
C. 
, 
D. 
, 
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Express the sum using summation notation with a lower limit of summation not necessarily 1 and with k for the index of summation.7 + 10 + 13 + 16 + ... + 37
A. 
B. 
C. 
D. 
Mathematics
Solve the system by elimination.
A. (7, 0) B. (-1, 8) C. (0, 8) D. (0, 7)
Mathematics