If 12a 3b=1 and 7b–2a=9 what is the average of a and b.

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02-12-2021
Mathematics

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If 12a 3b=1 and 7b–2a=9 what is the average of a and b.

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Baslelidn Baslelidn · Answer 1 · 2021-12-05T02:58:26-05:00

Baslelidn Baslelidn

05-12-2021

Answer:

b

Step-by-step explanation:

If 12a + 3b = 1 and 7b – 2a = 9, what is the average (arithmetic mean) of a and b ? Add 12a+3b= 1 and 7b-2a=9, then we will get 10a+10b=10 which results 10(a+b)=10. Thus a+b=1. Therefore, the answer is B

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