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castortr0y [4]
3 years ago
13

I NEED HELP PLEASE!!

Mathematics
1 answer:
Mrac [35]3 years ago
6 0

Answer:3.38

Step-by-step explanation:

Count, N: 5

Sum, Σx: 18

Mean, μ: 3.6

Variance, σ2:  11.44

Steps

(10 - 3.6)2 + ... + (2 - 3.6)2

5

=  

57.2

5

=  11.44

σ =  √11.44

=  3.38

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Alvin's age is three times Elgas age. The sum of their ages is 36. What is Elgas age?
olchik [2.2K]

Answer:

Elgas is 9 years old.

Step-by-step explanation:

Alvin: 3 x Elgas

36: Alvin + Elgas

36 / 4 : 9

Elgas: 9

Alvin: 27

To check: 27 + 9= 36

3 0
3 years ago
55.5% repeating as a decimal​
liberstina [14]

Answer:

0.555

Step-by-step explanation:

When you ask, "What is 55.5 as a decimal?", we assume you want to know what 55.5 percent is as a decimal. In other words, 55.5 percent converted to decimal.

First, we will tell you why it is useful to know 55.5 as a decimal.

Normally, to calculate 55.5 percent, you would multiply a number by 55.5 percent and then you would take the product of that and divide it by 100 to get the answer.

Instead, you can simply multiply a number by 55.5 as a decimal to get the answer.

55.5 percent means 55.5 per hundred. Therefore, to get 55.5 as a decimal, all you have to do is divide 55.5 by 100 like so:

55.5 ÷ 100 = 0.555

5 0
3 years ago
Read 2 more answers
Miles had a piece of paper 1/4 of a large circle cut in three equal parts from the center point of the circle. What angle is the
telo118 [61]
The angle of 1/4 of a circle is given by:
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3 years ago
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Answer:

20

Step-by-step explanation:

5(-2)+30 = (-10)+30 = 20

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1.4.7+4.7.10+7.10.13 to n terms
Cerrena [4.2K]
◆ SEQUENCE AND SERIES ◆

Heya !

Check the attachment.
Hope it helps you ;)

8 0
3 years ago
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