Speed
Step-by-step explanation:
The formula for determining speed is distance divided by time.
he spend 5.1 minutes chatting with his friends
step-by-step explanation:
2/5+1/2=9/10
6/1-9/10=5 1/10
i think is 3 and 6. this took me 10 min to think.hope to and hope that my answer is brainliest.(follow me )