Answer:

+2

Step-by-step explanation:

add the same signs first

-3 + -7 = -10

9 + 3 = 12

12 + -10 = 2

the answer is positive since positive is the dominant one

Answer:

0

Step-by-step explanation:

9+(-5)= 4

4+-(7)= -3

-3+(3) = 0

reason: positive numbers added to negative numbers will automatically decrease/minus