They have sold ten full cases
but have sold 10 and a half cases in total
(9y+y) + (6+3)
The answer is 10y+9
Let t become the time he spent commuting on the first day of his vacation.
It is then calculated as
.

It traveled
miles on its first day of operation.
The car traveled
on the second day, which was
.
So,
Total mileage= first day traveled + second day traveled 
Learn more:
Total distance traveled: brainly.ph/question/11690847
Answer:
14256
Step-by-step explanation:
- 10/100×15840=1584
- 15840-1584=14256
- Answer =14256