Question

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

2x + y = 2
3x + 4y = –7

[a]1

[b]5

[c]11

[d]15

Answer 1

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

Answer 2

So it would be like this:
First Row (2, 1)
Second Row(3, 4)

Answer 3

i know, i got to that answer but i dont know which one it is?

Answer 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 5

So its B..

Answer 6

thank you so much :]

Answer 7

your welcome..

Answer 8

@Trexy ok its five but what about right side?