Answer:
coefficent matrix
Step-by-step explanation:
P. 366
"If the column of constant terms is not included, the matrix reduces to that of the coefficent matrix of the system"
-1 -3 -1
9 -9 -1
-1 -3 4
The angle of depression is
tan^-1 3/7 = 23.2 deg
D) 150 miles ~ because when you multiply 150 miles by 30 cents every mile you get 45 which you add to the $20 a day fee you reach $65 which is equal to the $65 of Agency A
2.25 but i am not sure i hope that helps