Answer:
Step-by-step explanation:

Answer:The measure of angle C is 50°
Step-by-step explanation:
The sum of all inside angles must add up to 180°
80+50=130
130+C
C=50
130+50=180
She has 15 left because she had 28 then she at 3 which is now 25 then she gave 5 away which is 20 then she gave 5 more away which is 15. So she ends up with 15