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tensa zangetsu [6.8K]
3 years ago
14

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

Mathematics
1 answer:
saw5 [17]3 years ago
6 0

Hello, please consider the following.

3a+5b + 5a + 3b = 8(a+b)=10+30=40\\\\a+b=\dfrac{40}{8}=5

And the average is

\dfrac{a+b}{2}\boxed{=\dfrac{5}{2}}

Thank you.

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