What is 5x - 20 + 2x -7

Mathematics

1 answer:

Marrrta [24]2 years ago

5 0

5x -20 + 2x -7
= 5x + 2x -20 -7
= 7x -27

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17. When a single set of values is randomly divided into two equal groups, explain how the means of these two groups may be very

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If you take 2 groups of equal cardinality, it could happen that, for example, many of the higher values go to the first group and therefore, many of the low values go to the second group, making their respective means quite different and different from the original sample mean. This could even go worse due to the possible existence of outliers, that is, values that are far different than the sample mean. An outlier tend to disrup the mean of a sample, but for smaller samples the result is much dramatic.

For example, let X be {1,2,3,4,5,6,7,8,9,100}

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The triangle will still be similar to the original triangle.
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11. How many different ways can the 16 numbered pool balls be placed in a line on the pool table?

nikklg [1K]

Answer:

The number of ways are 16! or 20,922,789,888,000.

Step-by-step explanation:

Consider the provided information.

We need to determine the number of different ways 16 numbered pool balls be placed in a line on the pool table.

For the first place we have 16 balls.

For the second place we have 15 balls left.