Simplify. Express your answer with positive exponents. Assume that all variables are nonzero.
A. 
B. 
C. 
D. 
Answer: C
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Determine if the series converges or diverges; if the series converges, find its sum.
A. Converges; 1
B. Converges; ln 
C. Converges; ln 9
D. Diverges
Solve and graph the inequality. Give answer in interval notation.12x + 20 > 4(2x + 2)
A. (-?, 12)
B. (-?, -3)
C. (-3, ?)
D. (12, ?)
Solve the system of equations using Cramer's Rule, if applicable.
A. {(x,y) 
B. 
C. 
D. ?
Use the given encoding matrix A to solve the problem.A message has been encoded and the matrix which the receiver gets is shown below. 
The encoding matrix A which was used to encode the message is: A =
Find the decoding matrix A-1, and use it to decode the message. Assume that the numerical assignment used was a = 1, b = 2, ....., z = 26, space = 30, period = 40, and apostrophe = 60.
A. DRINK ENOUGH MILK B. EAT YOUR VEGETABLES C. DRINK ENOUGH COKE D. EAT YOUR BROCCOLI