I answered what I knew so hope it helps!!!
Part I
The weight of the truck without cargo is 22150+11300= 33450 pound
The weight of the cargo is given as
and altogether with the weight of the truck, the sum must not exceed 75500
The inequality is given
Part II
Hence, the maximum weight allowed for the cargo is 42050 pounds
Use the general definition:
|x - a| ≤ k => - k ≤ x - a ≤ k
So, |a - 9| ≤ 4 => - 4 ≤ a - 9 ≤ 4
Which is a - 9 ≥ - 4 and a - 9 ≤ 4.
That is the second option.
Answer: a - 9 ≤ 4 and a - 9 ≥ - 4