anthonylopez1
13.09.2019 •
Mathematics
use cramers rule to solve the following system:
5x - 3y + z = 6
2y - 3z = 11
7x + 10y = -13
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Ответ:
The solution to the system is , and
Step-by-step explanation:
Cramer's rule defines the solution of a system of equations in the following way:
, and where , and are the determinants formed by replacing the x,y and z-column values with the answer-column values respectively. is the determinant of the system. Let's see how this rule applies to this system.
The system can be written in matrix form like:
Then each of the previous determinants are given by:
Notice how the x-column has been substituted with the answer-column one.
Notice how the y-column has been substituted with the answer-column one.
Then, substituting the values:
Ответ:
B 20%
Step-by-step explanation:
100÷5= 20
1×20=20