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Natalka [10]
3 years ago
8

The mean of the numbers 15,21,17,26,18 and 29 is 21. Calculate the standard deviation. ​

Mathematics
1 answer:
kherson [118]3 years ago
6 0

Answer:

4.62910049578

Step-by-step explanation:

variation is standard deviation squared

variance = 21.428571428571

square root variance for answer.

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Area of square = 9 mm2<br> Perimeter of square=
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the perimeter of the square is 12 mm

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What are the intercepts for x and y ? thanks in advance
SpyIntel [72]

Answer:

see explanation

Step-by-step explanation:

The x- intercept is the value of x where the line crosses the x- axis.

The x- intercept is (0.3, 0)

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3 years ago
On a map, 1 inch equals 25 miles.Two cities are 3 inches apart on the map.What is the actual distance between the cities?
SVEN [57.7K]

Answer:

75 miles

Step-by-step explanation:

We are given the scale on the map, which is that 1 inch is 25 miles in real life. We can write that as a ratio of 1 inch: 25 miles. Now say we have two inches, then we have 50 miles because we add on another 25 miles, then we do that again and we get to 75 miles.

Another way to think about it (more complicated):

you can represent ratios as a fraction

so we do 1/25=3/x

To find x, we can do (25*3)/1 which equals 75, if you don't know what I did there then you don't know, sorry!

you can also do it in a different way

same scenario though

you represent it as a fraction

and do 1/25=3/x. We see that the ratio from 1 to 3 is multiplied by 3 so that means the ratio from 25 to x is also going to be multiplied by 3, and 25 multiplied by 3 is 75.

Please let me know if you have any questions.

5 0
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A birthday party host planned for 20 people, but 17 actually attended. What is the percent error?​
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