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Scorpion4ik [409]
3 years ago
5

What’s the Variace of 7, 5, 11, 1, 11

Mathematics
1 answer:
lara31 [8.8K]3 years ago
8 0
The mean is 35/5=7

v=((7-7)^2+(5-7)^2+(11-7)^2+(1-7)^2+(11-7)^2)/5

v=(0+4+16+36+16)/5

v=14.4
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Please help solve this and show work
Dafna11 [192]

Answer: x=9

Step-by-step explanation:

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subtract 43 from both sides

7x=63

divide by 7

x=9

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3 years ago
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horrorfan [7]

Answer:

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Step-by-step explanation:

4 0
3 years ago
What is the area of triangle EDF?
Ann [662]

Answer:

4.5

Step-by-step explanation:

∠BAC ~ ∠EDF means that the triangles are similar. So the legs of the triangle share the same proportions, even if the sizes are different.

Since they share the same proportions, the same operations can be performed on each base to find the area.

The answer can be found with the knowledge that the area of a triangle is half of the height * width. You know the width of ∠BAC is 4, and the area is 8, so 16 (the area doubled) / 4 is the height. The width and height of ∠BAC are the same, and since the proportions are also the same, the width and height of ∠EDF are both 3. So the area is the width (3) times the height (3) divided by 2.

3*3 = 9

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6 0
3 years ago
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Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
A doctor told a patient to drink 1.6 liters of water everyday. About how many liters should the patient drink in 14 days?
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He would have drank 22.4 litres of water in 14 days
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