Question

Choose the value of the x determinant (Dx) in the system.
3x – 7y = 11
2x + 5y = –4
Answer

A. 29

B. 83

C. 1

D. 27 Choose the value of the x determinant (Dx) in the system.
3x – 7y = 11
2x + 5y = –4
Answer

A. 29

B. 83

C. 1

D. 27 @Mathematics

Answer 1

What is the value for the coefficient determinant (D) in the following system?

2x + y = 2
3x + 4y = –7

For the coefficient determinant, make the coefficients of x one column and the coefficients of y the second.

First Row (2, 1)
Second Row(3, 4)

To evaluate the determinant, use this formula
for determinant with
Row 1: (a, b)
Row 2 (c, d)
Det = ad - bc

So for this problem = 2*4 - 3*1 = 5

Answer 2

opps wrong question :P

Answer 3

Dx I believe is the numerator of the Cramer Rule. Such that Dx is:

-4(-7) -11(5)