Given:
Number of cars Bob has = 10
Number of cars Tim has = 8
Let's determine how many cars they have together.
To find how many cars both Bob and Tim has together, let's add the number of cars Bab has and the number of cars Tim has together.
To find the sum, we have:
Total number of cars = 10 + 8 = 18
Therefore, they have 18 cars together.
ANSWER:
18