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katen-ka-za [31]
3 years ago
7

Please help Show workings!

Mathematics
1 answer:
Colt1911 [192]3 years ago
3 0

Answer:

LM = 57

Step-by-step explanation:

For each median (JN, ML and KP), the distance from a vertex to the centroid is twice the distance from the centroid to the midpoint of the side opposite that vertex.

In that case, LQ = 2QM

If LQ = 38 then QM = 19

38 + 19 = 57

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The radius and height of a cone are 8 cm and 15 cm respectively find its curved surface are
drek231 [11]

Answer:

Curved surface area of a cone =πrl.

3.142×8×15=377.04cm

8 0
2 years ago
Researchers are studying the distribution of subscribers to a certain streaming service in different populations. From a random
Katen [24]

Answer:

CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}

Step-by-step explanation:

Given

n = 200

x_1 = 34 -- City C

x_2 = 54 --- City K

Required

Determine the 90% confidence interval

This is calculated using:

CI = \bar x \± z\frac{\sigma}{\sqrt n}

Calculating \bar x

\bar x = \bar x_1 - \bar x_2

\bar x = \frac{x_1}{n} - \frac{x_2}{n}

\bar x = \frac{34}{200} - \frac{54}{200}

\bar x = 0.17 - 0.27

For a 90% confidence level, the ​z-score is 1.65.  So:

z = 1.65

Calculating the standard deviation \sigma

\sigma = \sqrt{(\bar x_1)*(1 - \bar x_1) + (\bar x_2)*(1 - \bar x_2) }

So:

\sigma = \sqrt{(0.17)*(1 - 0.17) + (0.27)*(1 - 0.27) }

\sigma = \sqrt{(0.17)*(0.83) + (0.27)*(0.73)}

So:

CI = (0.17 - 0.27)\± 1.65\frac{\sqrt{(0.17)*(0.83) + (0.27)*(0.73)}}{\sqrt {200}}

CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}

7 0
2 years ago
What is ?l4 as a mixed number?
PSYCHO15rus [73]

Answer:

It's a whole number. It cannot be a mixed number. Anyways I would have to know the denominator.

3 0
2 years ago
the perimeter of a basketball court is 284 ft. the length is 40 ft longer than the width. find the dimensions of the court.
mrs_skeptik [129]
284=2x+2(x+40)
284=4x+80
204=4x
51=x
dimensions 51 ft by 91ft
7 0
3 years ago
Read 2 more answers
Translate 6 units left and 7 units down​
fredd [130]
A (-5,0) B (0,-2) C (-3,-4)
7 0
3 years ago
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