Solve the system by elimination. If the system is inconsistent or dependent, say so.5x + 
y = 154x + 
y = 
A. (4, -2)
B. (5, -3)
C. (-4, -3)
D. empty set solution; inconsistent system
Answer: A
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Use the comparison test to determine if the series converges or diverges.
A. Converges B. Diverges
Find the derivative of the function.y = cos e-5x
A. 
= e-5x cos e-5x
B. 
= 5e-5xsin e-5x
C. 
= 5 sin e-5x
D. 
= -5e-5x sin e-5x
Find the expected value, the variance, and the standard deviation, when they exist, for the probability density function. Give an exact answer for the expected value and round the variance and standard deviation to four decimal places when appropriate.f(x) = 
A. 
; 9.1563; does not exist
B. 
; 83.8385; 9.1563
C. 
; does not exist; does not exist
D. 
; 83.8385; does not exist
Perform the indicated operations. Write the answer using only positive exponents. Assume all variables represent positive real numbers.(
)3 
-1
A. 
B. 
C. 
D. 