4 years ago

Weekly math homework - April 17-21

Mathematics

2 answers:

kenny6666 [7]4 years ago

6 0

OK so where is the weekly math homework!?

likoan [24]4 years ago

4 0

Post questions pleaaassseee

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. Use the statistical features of your calculator to find the mean and the standard deviation to the nearest tenth of a data set

uysha [10]

Answer:

Mean = 1.9

Standard deviation = 0.6

Step-by-step explanation:

The Mean is calculate by the formula:

$Mean = \frac{\text{Sum of all the observation}}{\text{Total number of observation}}$

⇒ $Mean = \frac{24.9+24.7+24.7+23.4+27.9}{5} = 1.85$

Thus Mean to the nearest tenth is 1.9

Standard Deviation is the square root of sum of square of the distance of observation from the mean.

$Standard deviation(\sigma) = \sqrt{\frac{1}{n}\sum_{i=1}^{n}{(x_{i}-\bar{x})^{2}} }$

where, $\bar{x}$ is mean of the distribution.

Putting all values in the formula, We get

Standard Deviation = 0.597 ≈ 0.6

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3 years ago

Which of the following statements explains why 0.8 is or is not a rational number?

noname [10]

Answer:

Step-by-step explanation:

its 8 bc when u put it under 9 it repeats

7 0

3 years ago

Simplify and then evaluate the equation<br> when x= 3.<br> -5(x – 5) + 2x = [?]

nadya68 [22]

Answer:

-3x+25

Step-by-step explanation:

3 0

3 years ago

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How to solve by completing the square: -X2 +1190X-3200

Vlad [161]

Answer:

x2+6512

Step-by-step explanation:

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4 years ago

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I need help with this question

aalyn [17]

The first step is to square root both sides to get the exponent out. that actually is the only step :)

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3 years ago