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3 years ago

What is the value of (-7+3i)-(2-6i)?

Mathematics

2 answers:

inn [45]3 years ago

6 0

Answer:

-9 + 9i.

Step-by-step explanation:

Given : (-7+3i) - (2-6i).

To find : what is the value.

Solution : We have given that

(-7+3i) - (2-6i).

Here we can solve whole number and imaginary number .

Now, removing the parenthesis.

-7 + 3i - 2 + 6i .

Combine like terms .

-7 - 2 + 3i + 6i .

-9 + 9i.

Therefore, -9 + 9i.

IRISSAK [1]3 years ago

3 0

The answer is -9 + 9i. Hope this helped.

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The ages of 11 students enrolled in an on-line macroeconomics course are given in the following steam-and-leaf display:

blsea [12.9K]

Answer:

The standard deviation of the age distribution is 6.2899 years.

Step-by-step explanation:

The formula to compute the standard deviation is:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

The data provided is:

X = {19, 19, 21, 25, 25, 28, 29, 30, 31, 32, 40}

Compute the mean of the data as follows:

$\bar x=\frac{1}{n}\sum\limits^{n}_{i=1}{x_{i}}$

$=\frac{1}{11}\times [19+19+21+...+40]\\\\=\frac{299}{11}\\\\=27.182$

Compute the standard deviation as follows:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

$=\sqrt{\frac{1}{11-1}\times [(19-27.182)^{2}+(19-27.182)^{2}+...+(40-27.182)^{2}]}}\\\\=\sqrt{\frac{395.6364}{10}}\\\\=6.28996\\\\\approx 6.2899$

Thus, the standard deviation of the age distribution is 6.2899 years.

7 0

3 years ago

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seropon [69]

B or A I’m pretty sure

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3 years ago

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Step-by-step explanation:

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The ratio of boys to girls in class is 4 : 5 <br> What fraction of the class are boys

Sav [38]

Answer:

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3 years ago

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Answer:

n = 3

Step-by-step explanation:

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n = 3

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3 years ago