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3 years ago

PLEASE HELP ME!! THANK YOU!!

Mathematics

1 answer:

Alik [6]3 years ago

6 0

Answer:

y $\leq$ 4,

y ∈ [-∞, 4]

Step-by-step explanation:

Remember, the range of the function is all possible output values or y values.

As per the graph, it appears that the output, the y value, is less than or equal to 4. Hence:

y $\leq$ 4

y ∈ [-∞, 4]

is the range, both are the same, they are just different ways of writing it.

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if you had to report on the salaries for different occupations, do you think it would be better to report the mean or the median

Vadim26 [7]

Answer = mean, the mean is an average of the data. On the other hand, the median accounts for the middle value of sets of numbers. It would make more sense if you would report the average of salaries for different occupations.

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3 years ago

I need this answer, please?

Anvisha [2.4K]

Answer:

4.23

Step-by-step explanation:

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3 years ago

Set A of six numbers has a standard deviation of 3 and set B of four numbers has a standard deviation of 5. Both sets of numbers

Alenkinab [10]

Given:

$\sigma_A=3$

$n_A=6$

$\sigma_B=5$

$n_B=4$

$\overline{x}_A=\overline{x}_B$

To find:

The variance. of combined set.

Solution:

Formula for variance is

$\sigma^2=\dfrac{\sum (x_i-\overline{x})^2}{n}$ ...(i)

Using (i), we get

$\sigma_A^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{n_A}$

$(3)^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}$

$9=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}$

$54=\sum (x_i-\overline{x}_A)^2$

Similarly,

$\sigma_B^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{n_B}$

$(5)^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}$

$25=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}$

$100=\sum (x_i-\overline{x}_B)^2$

Now, after combining both sets, we get

$\sigma^2=\dfrac{\sum (x_i-\overline{x}_A)^2+\sum (x_i-\overline{x}_B)^2}{n_A+n_B}$

$\sigma^2=\dfrac{54+100}{6+4}$

$\sigma^2=\dfrac{154}{10}$

$\sigma^2=15.4$

Therefore, the variance of combined set is 15.4.

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3 years ago

The left and right page numbers of an open book are two consecutive integers whose sum is 389. Find these page numbers

Nadya [2.5K]

Step-by-step explanation:

Maybe the page numbers can be 143 and 246

143 + 246 = 389

8 0

4 years ago

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What does 4(x+9) equal

lorasvet [3.4K]

4(x+9)

Solution

1) Distribute
4x+4×9

2) Simplify 4×9 to 36
4x+36

ANSWER = 4x+36

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3 years ago

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