First make 20 into a fraction, then solve; 3/5 · 20/1. 60/5 = 12. Hope that helps!
I think it is the mean and the range thats what i think
After combining like terms and simplifying
we get 
Step-by-step explanation:
We need to combine like terms to simplify the expression:

Like terms: The terms are like when they have same variable and same exponent.
Solving:

So, After combining like terms and simplifying
we get 
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Answer:
30 minutes
Step-by-step explanation:
2 and 1/2 hours is 2 hours and 30 minutes. If you divide that by 5, then 1/5 of 2 hours and 30 minutes is 30 minutes.
Answer:
1000
Step-by-step explanation:
3,450/3.45=1000