If three arithmetic means are instead between 11and 39 find the second arithmetic mean

Answers

1. (2m+5n)²
2. (3x+1) (3x-5)
3. (3m-2n)²
4. (p-8) (p+2)
5. (m-5) (m-3)
6. (x-16) (x+3)
7. (x-3) (x+1)
8. (x-3)²
9. (9x-8)²

1. 1 1/8
2. 4 11/12
3. 5 11/12
4. 13 7/15
and so on
Since the arithmetic means are 18, 25, and 32, then the second arithmetic mean is 25.


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