Question

X + 3y + z = 23, x - y + z = 9, X- 4y +
2z = 7 values of x,y, and z using
Cramer's rule will be
O x = 1, y = 2, z = -1
O x = 2, y = - 1, Z = -0.5
O x = 1, y = 2, z = -0.5
O
x= 2, y = 2, z = -1​

Answer 1

Answer:

2nd one is the correct answer

Answer 2

Answer:

Answer: b

Step-by-step explanation:

∆ = ⎛⎝⎜1313−1−4642⎞⎠⎟ = -58

X = (1/∆) = ⎛⎝⎜2973−1−4642⎞⎠⎟ = -116/-58 = 2

Y = (1/∆) = ⎛⎝⎜131297642⎞⎠⎟ = 58/-58 = -1

Z = (1/∆) = ⎛⎝⎜1313−1−4297⎞⎠⎟ = -29/-58 = 0.5

Hence, x = 2, y = -1, z = -0.5.