Solve the system of equations using Cramerʹs Rule if it is applicable. If Cramerʹs Rule is not applicable, say so.
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A)x = 1, y = 6, z = 8; (1, 6, 8)
B)x = 6, y = 8, z = 6; (6, 8, 6)
C)x = 1, y = -6, z = -8; (1, -6, -8)
D)x = 2, y = 4, z = 8; (2, 4, 8)

Question

Solve the system of equations using Cramerʹs Rule if it is applicable. If Cramerʹs Rule is not applicable, say so.
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A)x = 1, y = 6, z = 8; (1, 6, 8) 
B)x = 6, y = 8, z = 6; (6, 8, 6) 
C)x = 1, y = -6, z = -8; (1, -6, -8) 
D)x = 2, y = 4, z = 8; (2, 4, 8)

Quizplus · Accepted Answer

Cramer's Rule is applicable since there are the same number of equations as variables. The determinant of the coefficient matrix is non-zero, so there is a unique solution. Using Cramer's Rule, we can find that x=1, y=6, and z=8. Therefore, the answer is choice A.

Solve the System of Equations Using Cramerʹs Rule If It