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joja [24]
3 years ago
8

I need help pls step by step i will really appreciate pls also l will mark you the brainly if you did !

Mathematics
1 answer:
agasfer [191]3 years ago
4 0

Answer:

1. 2

2.3\sqrt{5}

3.8\sqrt{6}

4.2.5\sqrt{10}

Step-by-step explanation:

Remember that \frac{\sqrt{a}}{\sqrt{b}}=\sqrt{\frac{a}{b} }, and \frac{a}{\sqrt{b}}=\frac{a}{\sqrt{b}}*\frac{\sqrt{b}}{\sqrt{b}}=\frac{a\sqrt{b}}{b}

1. \frac{\sqrt{48}}{\sqrt{12} }= \sqrt{\frac{48}{12} }=\sqrt{4}=2

2. \frac{15}{\sqrt{5} }=\frac{15}{\sqrt{5} }*\frac{\sqrt{5}}{\sqrt{5} }=\frac{15\sqrt{5} }{5}}=3\sqrt{5}

3. \frac{48}{\sqrt{6}}= \frac{48}{\sqrt{6}}* \frac{\sqrt{6}}{\sqrt{6}}= \frac{48\sqrt{6}}{6}=8\sqrt{6}

4. \frac{25}{\sqrt{10}}=\frac{25}{\sqrt{10}}*\frac{\sqrt{10}}{\sqrt{10}}=\frac{25\sqrt{10}}{10}=2.5\sqrt{10}

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Need help again, I really hate math please help​
hoa [83]
C I think good luck
3 0
2 years ago
A repeated-measures study comparing two treatments with n = 4 participants produces md = 2 and ss = 75 for the difference scores
valentinak56 [21]

The estimated standard error for the sample mean difference is  2.5 .

According to the question

A repeated-measures study comparing two treatments

n = 4

MD(mean difference) = 2

SS (sum of square) = 75

Now,

error for the sample  

Formula for standard error

S^{2} = \frac{SS}{n-1}

by substituting the value

S^{2} = \frac{75}{4-1}

S^{2} = \frac{75}{3}

S² = 25

S = 5 (s is never negative)

Standard error of the estimate for the sample mean difference

As

The standard error of the estimate is the estimation of the accuracy of any predictions.

The formula for standard error of the mean difference

standard error of the mean difference  =\frac{standard\\\ error}{\sqrt{n} }  

standard error of the mean difference = \frac{5}{\sqrt{4} }  

standard error of the mean difference = 2.5

Hence, the estimated standard error for the sample mean difference is  2.5 .

To know more about estimated standard error here:

brainly.com/question/14524236

#SPJ4

5 0
1 year ago
What is an equation for a circle with a center at (-2,3) and a radius of 3
neonofarm [45]

Answer:

(x+2)² + (y–3)² = 3²

Step-by-step explanation:

just use the standard formula

3 0
3 years ago
From the quadratic equation 3x² + X - 5 = 0, find alpha square plus beta square​
timama [110]

Answer:

  α² +β² = 3 4/9

Step-by-step explanation:

Assuming α and β are solutions to the equation, it can be factored as ...

  (x -α)(x -β) = 0

Expanding this, we get ...

  x² -(α +β)x +αβ = 0

Dividing the original equation by 3, we find ...

  x² +(1/3)x -5/3 ≡ x² -(α+β)x +αβ   ⇒   (α+β) = -1/3, αβ = -5/3

We know that the square (α+β)² can be expanded to ...

  (α +β)² = α² +β² +2αβ

  α² +β² = (α +β)² -2αβ . . . . . . subtract 2αβ

Substituting the values for (α+β) and αβ, we find the desired expression is ...

  α² +β² = (-1/3)² -2(-5/3) = 1/9 +10/3 = 31/9

  α² +β² = 3 4/9

4 0
2 years ago
What is the area of a shaded segment with an area of 12 and an arch angle of 60
Scorpion4ik [409]
<span>Let A = the area of the whole circle
Let S = the area of the shaded portion</span><span>
The shaded area is a portion of the circle that is determined by the ratio of the shaded sector to the whole circle of 360 degrees, or
 S = (60/360) </span>× <span>A = ( 1 / 6 ) </span>× 12 = 2 ;
3 0
3 years ago
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