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3 years ago

A2 + 2ab + b2-9 Pls help

Mathematics

2 answers:

Anarel [89]3 years ago

8 0

Answer:

(a + b + 3 ) ( a + b − 3 )

Step-by-step explanation:

valentinak56 [21]3 years ago

4 0

Answer:

${\huge{\mathfrak{\underbrace{\pink{Answer}}}}}$

I hope this helps you.....

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nadezda [96]

Brainliest? The outcome of the second selection is not affected in any way by the outcome of the first selection. Therefore the events are independent.

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3 years ago

Read 2 more answers

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stiv31 [10]

1. 3x-6+2x+108+88=360
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3 years ago

The number of typographical errors on a page of the first booklet is a Poisson random variable with mean 0.2. The number of typo

muminat

Answer:

The required probability is 0.55404.

Step-by-step explanation:

Consider the provided information.

The number of typographical errors on a page of the first booklet is a Poisson random variable with mean 0.2. The number of typographical errors on a page of second booklet is a Poisson random variable with mean 0.3.

Average error for 7 pages booklet and 5 pages booklet series is:

λ = 0.2×7 + 0.3×5 = 2.9

According to Poisson distribution: $P(k{\text{ events in interval}})={\frac {\lambda ^{k}e^{-\lambda }}{k!}}$

Where $\lambda$ is average number of events.

The probability of more than 2 typographical errors in the two booklets in total is:

$P(k > 2)= 1 - {P(k = 0) + P(k = 1) + P(k = 2)}$

Substitute the respective values in the above formula.

$P(k > 2)= 1 - ({\frac {2.9 ^{0}e^{-2.9}}{0!}} + \frac {2.9 ^{1}e^{-2.9}}{1!}} + \frac {2.9 ^{2}e^{-2.9}}{2!}})$

$P(k > 2)= 1 - (0.44596)$

$P(k > 2)=0.55404$

Hence, the required probability is 0.55404.

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3 years ago

What is the square root of 21

Andru [333]

Answer:

4.58

Step-by-step explanation:

21 is not a perfect square, but lies between the perfect squares 16 and 25. Thus, √21 lies between √16 and √25, that is, between 4 and 5. Since 21 is closer to 25 than to 16, √21 is closer to 5 than to 4. A rough estimate of √21 would be 4.7.

√21 done on a calculator comes out to 4.58.

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3 years ago

PLEASE ANSWER

Over [174]

Answer:

true

Step-by-step explanation:

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3 years ago