Answer:
Step-by-step explanation:
Whenever you add two number x and -x and it becomes 0 . IT is the identity property.
Ex:
-1/3 + 1/3 = 0
-1 + 1 = 0
-58 + 58 = 0
it has to be 21 because if calculate the bill cycle that what you get
he gained 2,100
169 - 9 = 160
Answer: 6:19
m = -3
