1 minus 3? its -2.. not sure if that is entirely what you were meaning
Step-by-step explanation:
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I could be wrong on this..
9) yes
10) If you live in Georgia, then you live in Atlanta
11) If three points are collinear, then they are coplanar.
if three points are coplanar, the they are collinear.
The answer is 80 hope this helps :)