Solve the system of equations by using the inverse of the coefficient matrix if it exists and by the echelon method if the inverse doesn't exist. -2x - 3y = -12 -6x - 9y = -36
A. No inverse, no solution for system
B. (3, -6)
C. (-3, 6)
D. No inverse, 
Answer: D
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Solve the equation.6(x + 3) - (6x + 18) = 0
A. {all real numbers} B. ? C. {3} D. {0}
Perform the indicated operation.
? 
A. 
B. 
C. 
D. 
Find the value. Give an approximation to four decimal places.log(320 × 39)
A. 9.4319 B. 3.9859 C. 4.0962 D. 21.1326
Find all absorbing states for the transition matrix, and indicate whether or not the matrix is that of an absorbing Markov chain.
A. State 2 is absorbing; the matrix is that of an absorbing Markov chain. B. State 4 is absorbing; the matrix is not that of an absorbing Markov chain. C. States 2 and 3 are absorbing; the matrix is not that of an absorbing Markov chain. D. States 2 and 4 are absorbing; the matrix is that of an absorbing Markov chain.