Solve the system of equations using Cramer's rule.
-$2 x+7 y=-26.3$
$8 x-5 y=-22.7$
A) $(-4.1,-2.8)$
B) $(-4.7,-2.2)$
C) $(-4.4,2.5)$
D) $(-4.4,-2.5)$

Question

Quizplus · Accepted Answer

Cramer's rule involves calculating determinants. The determinant of the coefficient matrix is -66. The determinant for x is 290.4, and for y is 165. Therefore, x = 290.4 / -66 = -4.4 and y = 165 / -66 = -2.5.

Solve the System of Equations Using Cramer's Rule 2x+7y=−26.32 x+7 y=-26.32x+7y=−26.3

Solve the System of Equations Using Cramer's Rule $2 x+7 y=-26.3$