I really need help I don’t understand this problem plz.

1. A, (+) + (-)

2. D, (+) + (+)

3. B, (-) + (-)

4. C, (-) + (+)

Step-by-step explanation:

1. When a positive number is subtracted from a positive, it becomes an added negative number. For example, 6 - 6 = 6 + (-6) = 0.

2. When a negative number is subtracted from a positive, it becomes an added positive number. In other words, subtracting a negative becomes adding a positive. For example, 6 - (-6) = 6 + 6 = 12.

3. When a negative number is added to a negative, it becomes a subtracted positive number. For example, -6 + (-6) = -6 - 6 = - 12.

4. When a negative number is subtracted from a negative, it becomes an added positive number. For example, -6 - (-6) = -6 + 6 = 0.

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step-by-step explanation:

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9