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stiks02 [169]
2 years ago
10

Help Me, Now! E. The Siblings need to save $1,150. At what week will they have enough between both accounts? Week 1, Week 2, Wee

k 3, Or Week 4?​

Mathematics
1 answer:
julsineya [31]2 years ago
7 0
Theres not enough info
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What is the mean, variance, and standard deviation of the values? Round to the nearest tenth. 1,9,4,12,13,13
tankabanditka [31]

To compute the mean, you simply have to sum all the elments in the data set and the divide the sum by the number of elements:


M = \frac{1+4+9+12+13+13}{6} = \frac{52}{6} = 8.6


To compute the variance, we first need to compute the distance of each element from the mean. To do so, we build a "parallel" dataset, given by the difference of every value and the mean:


D' = 1-8.6,9-8.6,4-8.6,12-8.6,13-8.6,13-8.6


D' = -7.6, 0.4, -4.6, 3.4, 4.4, 4.4


Now we need those difference squared:


(D')^2 = 57.76, 0.16, 21.16, 11.56, 19.36, 19.36


The variance is the mean of this new vector, so


\sigma^2 = \frac{57.76+ 0.16+ 21.16+ 11.56+ 19.36+ 19.36}{6} = \frac{129.36}{6} = 21.6


Finally, the standard deviation is simply the square root of the variance, so you have


\sigma = \sqrt{21.6} = 4.6

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3 years ago
A salesperson earns $200 a week plus a 4% commission on her sales. Which equation models the relationship between her sales in a
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Solve for m:<br><br> 13=2m+5<br><br><br> Please explain how you figured this out.
Temka [501]

Answer:

m=\left(2m+5\right)

Step-by-step explanation:

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the water level in a swimming pool decreases from 60in to 58.25in in one week. Assuming that the water level changes at a consta
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60-58.25= 1.75... 1.75 divided by 7 (days in a week) = 0.25 inches per day
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Step-by-step explanation:

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