Absolute value is a number's distance from 0, another way to think of it is that it makes any number positive, so |-6|, the absolute value of -6 would be 6.
Dang...I literally had this question in Algebra the other day, and got it wrong....but i believe the actual answer was B. It was for sure not D XD. Sorry if I am wrong yet again.
We are dividing the parking amount they had to pay by the 5 friends since they are splitting the amount they pay. Then we are adding 30 because that is how much each friend is paying.