Question

If I sent 5 emails to my friends and they each send 5 email & this happens 2 more times, which expression shows the total number of people who received the email, not including me

Answer 1

(5+5)x2

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.