Question

If you were to solve the following system of equations by using a matrix, which of the following would be your coefficient matrix?

5x-y=18
3x+8y=15

A. 5 3
-1 8

B. 5 -1
3 8

C. 5 18
3 15

D. 5 -1 18
3 8 15
is it D?

Answer 1

http://www.mathwords.com/c/coefficient_matrix.htm

Answer 2

So its B

Answer 3

The coefficient matrix means use the coefficients that are attached to the variables, so x and y here. The 18 and 15 on the right side are not attached to variables. So yes, it should be (B).