Which expression is equal to 3x?

Mathematics

2 answers:

Harman [31]3 years ago

5 0

Answer:

B. $x+x+x$

Step-by-step explanation:

We are asked to find the equivalent expression to $3x$ .

Our given expression stands for 3 times x. This means x is multiplied by 3 or we can say that x is added to itself 3 times.

We can rewrite $3x$ as $x+x+x$ .

Upon looking at our given choices, we can see that only option B is the correct choice.

soldier1979 [14.2K]3 years ago

4 0

that's too easy question anyway thanks for giving me points.

it's x+x+x

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A company decides to investigate the amount of sick leave taken by its employees. A sample of seven employees yields the followi

Svet_ta [14]

Using statistical concepts, we have that:

a. The range is 6 days, and the interpretation is: B. The number of days separating the fewest and most sick days taken is equal to the range.

b. The standard deviation is of 2.2, which means that the average spread about the mean is of 2.2 units.

<h3>Range and standard deviation:</h3>

The range of a data-set is given by the difference <u>between the highest value and the lowest value in the data-set</u>.

The standard deviation of a data-set is given by the <u>square root of the sum of the difference squared of each observation and the mean, divided by the number of observations</u>.

Item a:

The lowest value is of 0.

The highest value is of 6.

Hence:

The range is 6 days, and the interpretation is: B. The number of days separating the fewest and most sick days taken is equal to the range.

Item b:

The mean is:

$M = \frac{0 + 1 + 4 + 0 + 0 + 6 + 3}{7} = 2$