All categories

2 years ago

!!!!PLEASE HELP!!!!

Mathematics

1 answer:

Lynna [10]2 years ago

3 0

(D)

Step-by-step explanation:

Multiply and divide the fraction by the conjugate:

$\dfrac{2}{\sqrt{13}+\sqrt{11}}×\dfrac{\sqrt{13}-\sqrt{11}}{\sqrt{13}-\sqrt{11}}$

$= \dfrac{2(\sqrt{13} - \sqrt{11})}{(\sqrt{13})^2 - (\sqrt{11})^2}$

$=\dfrac{2(\sqrt{13} - \sqrt{11})}{2}$

$=\sqrt{13} - \sqrt{11}$

You might be interested in

The banna is 8 inches longhow many 0.4 inces of banana can be cut from tis banna

pogonyaev

Let’s divide 8 by 0.4
8/0.4=20

20 0.4 inch pieces can be cut from this banana

4 0

3 years ago

Read 2 more answers

What is the distance between point G(−4, 1) and point H(−12, 1) ?

Naya [18.7K]

Answer:

8 units

Step-by-step explanation:

because they have the same y axis all we need to do is subtract the distance between the x axis to get the distance between the points

5 0

2 years ago

Read 2 more answers

Direct variation or not a direct variation<br><br> y=5/x

MrRissso [65]

Answer:

not direct variation

Step-by-step explanation:

The equation for x and y in direct variation is

y = kx ← k is the constant of variation

y = $\frac{5}{x}$ is not in this form, thus not direct variation.

The equation for x and y varying inversely is

y = $\frac{k}{x}$ ← k is the constant of variation

y = $\frac{5}{x}$ is in this form and represents inverse variation

7 0

2 years ago

Got another question for you guys! What is 12.5 x 4.2?

yarga [219]

Answer:

52.5

Step-by-step explanation:

3 0

2 years ago

The means and mean absolute deviations of sidney’s and phil’s grades are shown in the table below. means and mean absolute devia

DochEvi [55]

The expression that represents the ratio of the difference of the two means to Sidney’s mean absolute deviation is given by: Option B: 4/3.28

<h3>What is mean absolute deviation?</h3>

Mean absolute deviation is the average of the absolute deviation of each observation from their mean, for a considered set of observations.

For this case, the table of mean and mean absolute deviation is given as:

$\begin{array}{ccc}&Mean&M.A.D.\\\text{Sidney}&82&3.28\\\text{Phill}&78&3.96\end{array}$

(M.A.D refers to Mean Absolute Deviation).

So, difference in their mean is 82 - 78 = 4

Absolute deviation for Sidney is 3.28

Thier ratio is: 4/3.28

Thus, the expression that represents the ratio of the difference of the two means to Sidney’s mean absolute deviation is given by: Option B: 4/3.28

Learn more about ratio here:

brainly.com/question/12106245

4 0

2 years ago