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german
3 years ago
6

The mean of 4 8 9 x and 2x is 6 calculate the value of x

Mathematics
1 answer:
Paul [167]3 years ago
7 0

Answer:

x = 3

Step-by-step explanation:

Mathematically, the mean is the sum of the numbers divided by the count of the numbers

The count of the numbers is 5

Thus;

( 4 + 8 + 9 + x + 2x)/5 = 6

(21 + 3x)/5 = 6

21 + 3x = 6(5)

21 + 3x = 30

3x = 30-21

3x = 9

x = 9/3

x = 3

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Step-by-step explanation:

The slope-intercept form of an equation of a line:

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<em>m</em><em> - slope</em>

<em>b</em><em> - y-intercept</em>

<em />

Put the value of slope <em>m = 5</em> and the coordinates of the given point (8, 1) to the equation of a line:

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