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2 years ago

Please answer 3 due tomorrow

Mathematics

2 answers:

leonid [27]2 years ago

7 0

The answer is 36.18 ❤️

ivolga24 [154]2 years ago

4 0

You have to do 33.48x2.7 because that's what it's is asking. Your answer is 90 mph.

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Find the variance of this probability distribution. Round to two decimal places.

attashe74 [19]

Answer:

Variance = 4.68

Step-by-step explanation:

The formula for the variance is:

$\sigma^{2} =\frac{\Sigma(X- \mu)^{2}}{N} \\or \\ \sigma^{2} =\frac{\Sigma(X)^{2}}{N} -\mu^{2} \\$

Where:

$X: Values \\\mu: Mean \\N: Number\ of\ values$

The mean can be calculated as each value multiplied by its probability

$\mu = 0*0.4 + 1*0.3 + 2*0.1+3*0.15+ 4*0.05=1.15$

$\frac{\Sigma (X)^{2}}{N} =\frac{(0^{2}+1^{2}+2^{2}+3^{2}+4^{2})}{5} =6$

Replacing the mean and the summatory of X:

$\sigma^{2} = \frac{\Sigma(X)^{2}}{N} -\mu^{2} \\= 6 - 1.15^{2}\\= 4.6775$

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3 years ago

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Leviafan [203]

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yarga [219]

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2 years ago

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A person can drive 200 miles in 4 hours.What is the constant of proportionality?

Eddi Din [679]

To get the constant of proportionality (unit rate) you must find the miles driven in 1 hour. To get this you simply divide 200 by 4...
200÷4=50
So, the constant of proportionality is 50 mph.

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Meg has 2 berries, Paul has 2 berries, Mia has 5, Yen has 7, and April has 9. If they all put their berries together and then di

Sonbull [250]

Answer:

Step-by-step explanation:

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1 year ago