Answer:
4, 5, 27.
Step-by-step explanation:
Let us find our numbers using given information.
Factors of 20 are: 1,2,4,5,10 and 20.
Let us try by taking number 4 and 5.
We can see that 
Now let us find sum of these numbers.

Therefore, numbers chosen by Boris will be 4, 5 and 27 as these numbers satisfies our all conditions.
Answer:
1.) Some
Step-by-step explanation:
Natural numbers do not contain negative numbers, but they do contain whole numbers like 1, 2, 3. So your answer would be some.
The greatest commom factor of 12 and 10 is 2. So, take 2 outside the () so you get. 2(6+5x)
Answer:
2/3
Step-by-step explanation:
The slope is 2/3 because when using the rise over run formula
your rise would be 2 and the run would be 3