Answer:
5
Explanation:
The first says 4 and 4
They added 4 to the previous cumulative, which was nothing and thru got the cumulative of 4+0=4
The second says 10 and 14
Same thing. Adding 10 to the previous cumulative, which was 4, you get 4+10=14
Let's follow the rules for this next one
We have ? and 19
Adding ? to the previous cumulative, which was 14, you get 14+?=19
Making ? = 5 because that what 19-14 is