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cluponka [151]
3 years ago
14

Hey... what's

xFormula1" title="(a {}^{2} - b {}^{2} ) = " alt="(a {}^{2} - b {}^{2} ) = " align="absmiddle" class="latex-formula">
​
Mathematics
2 answers:
kogti [31]3 years ago
8 0

Answer:

(a^{2} - b^{2} ) = (a + b)(a - b)

Step-by-step explanation:

This is the Difference of Squares: (a^{2} - b^{2} ) = (a + b)(a - b).

Hope it helps!

AlekseyPX3 years ago
8 0

it is (a + b) ( a - b )

<em>hope </em><em>it </em><em>helps</em>

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The mathematics faculty at a college consists of 11 professors, 12 associate professors, 7 assistant professors, and 6 instructo
Nikolay [14]

Answer:

The probability of choosing a professor or an instructor is 47.22%.

Step-by-step explanation:

Given that the mathematics faculty at a college consists of 11 professors, 12 associate professors, 7 assistant professors, and 6 instructors, if a faculty member is selected, to find the probability of choosing a professor or an instructor the following calculation must be performed:

11 + 12 + 7 + 6 = 100

11 + 6 = X

36 = 100

17 = X

17 x 100/36 = X

1700/36 = X

47.22 = X

The probability of choosing a professor or an instructor is 47.22%.

8 0
3 years ago
A population has a standard deviation of 5.5. What is the standard error of the sampling distribution if the sample size is 81?
VladimirAG [237]

Answer:

\sigma = 5.5

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution \bar X and for this case we know that the distribution is given by:

\bar X \sim N(\mu ,\frac{\sigma}{\sqrt{n}})

And the standard error would be:

\sigma_{\bar x}= \frac{\sigma}{\sqrt{n}}

And replacing we got:

\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611

Step-by-step explanation:

For this case we know the population deviation given by:

\sigma = 5.5

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution \bar X and for this case we know that the distribution is given by:

\bar X \sim N(\mu ,\frac{\sigma}{\sqrt{n}})

And the standard error would be:

\sigma_{\bar x}= \frac{\sigma}{\sqrt{n}}

And replacing we got:

\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611

4 0
3 years ago
Judd is 3 years older than Jordan. Jordan is 6 years younger than Chris. Write an algebraic expression for the sum of their ages
Cloud [144]

Answer:

تيتلتبنبزلمينبووبصحثنل

6 0
2 years ago
What is the answer!!! Pls reply!!
Ulleksa [173]
2 11/12 is your answer because 

3-2=1+1=2

and 4/12 - 3/12 = 1/12 + 10/12 = 11/12.
7 0
3 years ago
My dad is 5ft8 my mom is 5ft5 I am between 4ft11 and 5ft0 how tall will I be later on im a boy btw
coldgirl [10]

Answer:

There is no way to tell

Step-by-step explanation:

You could be way taller than your parents, the same height, or shorter. There are too many variables at play here.

7 0
3 years ago
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