Answer:
you got 12 more then your friend, 45-23
Step-by-step explanation:
Answer:

Step-by-step explanation:
observe

Answer:
It's 3 (a + 11)
Step-by-step explanation:
I don't know if you said that the 3 was a negative but if you did then don't choose my answer.
20 thousands would be 200 hundreds
1 hour=60 minutes 12×5=60
9×5=45
About 45 messages per hr