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
Answer:
Step-by-step explanation:
the answer is in days
3+6x+3x+ 6 = 180
9x + 9 = 180
9x = 171
x = 19
Answer:
A.

Step-by-step explanation:

Answer:
d
Step-by-step explanation:
d does not have any repeaing decimals, or any other type of irrational number