10. The difference between two negative numbers is always negative.

The negative of a negative is the opposite positive number  When you subtract a positive integer from a negative integer the difference is always negative . When you subtract two negative integers and the first integer (or minued) is larger than the second integer . The difference is positive .

Step-by-step explanation:

1 is c

2 is a

3 is a

step-by-step explanation:

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are