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If 3a +5b =10 and 5a +3b =30 what is the average of a and b?
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If 3a +5b =10 and 5a +3b =30 what is the average of a and b?

User Pabloxio
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1 Answer

3 votes

Hello, please consider the following.


3a+5b + 5a + 3b = 8(a+b)=10+30=40\\\\a+b=(40)/(8)=5

And the average is


(a+b)/(2)\boxed{=(5)/(2)}

Thank you.

User TriskalJM
by
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