Answer:
It should be the last one, She made a sign error when multiplying.
Answer:

Step-by-step explanation:

The best answer is C : The sum of the measures of two angles os 180 degrees .
Answer:
3
Step-by-step explanation:
3 mah fwend omg so hard my brain hurts
Answer:
Here's a picture with the work done.
Step-by-step explanation: