can some one plzz help

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07-05-2015
Mathematics

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can some one plzz help

Sagot :

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determine by substitution if -2 is the root of 5x=10

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AL2006 AL2006 · Answer 1 · 2015-05-07T13:33:57-04:00

This is an unusual way of presenting a set of data.   Usually, when they ask for the mean, it's the mean of a bunch of numbers. In this problem, it's the mean of some property of a bunch of points.

Look at the points on the graph.
There are ten points:

There are 2 points where Variable A is 1.
There are 2 points where Variable A is 2.
There is 1 point where Variable A is 3.
There is 1 point where Variable A is 4.
There are no points where Variable A is 5.
There is 1 point where Variable A is 6.
There is 1 point where Variable A is 7.
There is 1 point where Variable A is 8.
There are no points where Variable A is 9.
and
There is 1 point where Variable A is 10.

So there you have the ten numbers for Variable A :

   1, 1, 2, 2, 3, 4, 6, 7, 8, 10.

To find their mean:

   Addum up:      44

   Divide the sum by 10: 4.4

Sagot :

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