Question

Find
9 of
value of x
5,7,9 x
if mean is​

Answer 1

Step-by-step explanation:

If the mean of 5, 7, 9, n is 9 then

$\frac{5 + 7 + 9 + n}{4} = 9 \\ 21 + n = 9 \times 4 \\ 21 + n = 36 \\ n = 36 - 21 \\ n = 15 \\ \\ please \: like \: and \: mark \\ as \: brainliest$

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Answer 2

Answer:

x=15

Step-by-step explanation:

according to the question

mean=9

(5+7+9+x)/4=9

21+x=36

so

x=15