Answer:
(5+5)x2
Step-by-step explanation:
I think this is it, as for you said a person sent 5 emails to 5 friends, so 5 so far. Then they sent 5 mails, 5+5=10. This happened 2 times so 10x2.
5
30-10=20
20/4
If then angle is in the III quadrant.
Since then (we get angle in the III quadrant)
Consider
If then