3 years ago

Find the polynomial M if 2x^2− 1/3 ax+by−M=0.

Mathematics

1 answer:

PSYCHO15rus [73]3 years ago

3 0

23/8 for the most part I think

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A cake decorator needs 5.333 hours

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Rainbow [258]

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Read 2 more answers

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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4 years ago

The price of a shirt was originally $14.54, but the price has been reduced by 31%. What is the price of the shirt after the disc

Savatey [412]

Answer:

Step-by-step explanation:

(31/100)×14.54

= $4.51

S.P= O.P-D.P

= (14.54-4.51)$

= $10.03

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