State the name of the property illustrated.2 + (8 + 7) = (2 + 8) + 7
A. Identity property of addition
B. Associative property of addition
C. Commutative property of addition
D. Distributive property of multiplication over addition
Answer: B
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Solve using Cramer's rule, if possible. If it is not possible, state whether the system is inconsistent or has infinitely many solutions.
A. (5, 4) B. (-5, -4) C. (4, 5) D. (-4, 5)
Multiply. 
A. 3.251778 B. 3251.778 C. 325.1778 D. 32.51778
Solve the exponential equation by taking the logarithm on both sides. Express the solution set in terms of logarithms.e3x = 6
A. {3 ln 6}
B. 
C. 
D. 
A matrix, A, corresponding to a system of linear equations and the matrix rref(A) obtained after the Gauss-Jordan elimination method is applied to A, are given. Write the system of linear equations corresponding to A, and use rref(A) to give all solutions of the system of linear equations. A = 
; rref(A) = 
A.
z = any value, y = 1 + 2z, x = 7 - 5z
B.
z = any value, y = 1 + 2z, x = 7 - 5z
C.
z = any value, y = -2, x = 5
D.
z = any value, y = 1 - 2z, x = 7 + 5z