What is the determinant of the coefficient matrix of the system

Hence, the determinant of the coefficient matrix of the system is:

                                            65

We are given a system of linear equation in terms of variable x,y and z as:

Hence, the coefficient matrix that is obtained with the help of these system of equation let us denote by A is:

Now let us find the determinant of the matrix by expanding along row 1 as:

              Hence, the determinant is:

                                    65

2? if not the correct answer you might need to provide more information

step-by-step explanation:

answer: i'm not going to give you the answer, but some hints to work it out.

step-by-step explanation: so, if there is a straight line that means that the line angle is 180°. so we subtract the 2 angle measures provided, (15 and 38) from 180. so the answer is 180 - (38 + 15). (you have to solve the equation)