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Lisa [10]
2 years ago
8

. (a + b)2 – (2a – b)

Mathematics
2 answers:
inn [45]2 years ago
3 0

Answer:

(-b) is the answer.

Step-by-step explanation:

2(a-b)-(2a-b)

=2a-2b-2a+b (opening the brackets)

= -b

Hope this helps you buddy. Have a nice day^_^.

If you have doubt then you can ask in comments. I will surely answer.

harina [27]2 years ago
3 0

Answer:

3b

Step-by-step explanation:

=2a +2b-2a+b

=3b

yesyesyrssdfc

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Answer:

a) 3.6

b) 1.897

c)0.0273

d) 0.9727

Step-by-step explanation:

Rabies has a rare occurrence and we can assume that events are independent. So, X the count of rabies cases reported in a given week is a Poisson random variable with μ=3.6.

a)

The mean of a Poisson random variable X is μ.

mean=E(X)=μ=3.6.

b)

The  standard deviation of a Poisson random variable X is √μ.

standard deviation=S.D(X)=√μ=√3.6=1.897.

c)

The probability for Poisson random variable X can be calculated as

P(X=x)=(e^-μ)(μ^x)/x!

where x=0,1,2,3,...

So,

P(no case of rabies)=P(X=0)=e^-3.6(3.6^0)/0!

P(no case of rabies)=P(X=0)=0.0273.

d)

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P(at least one case of rabies)=1-0.0273=0.9727

8 0
3 years ago
-x=-24 <br> it’s for pre-algebra
labwork [276]
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By taking a common denominator, we can find out that the simplified expression of the given expression is \frac{6c+4}{c^{2} } .

The given expression is -

\frac{6}{c}+\frac{4}{c^{2} } ---- (1)

We have to simplify the expression.

From equation (1), we have the given expression as -

\frac{6}{c}+\frac{4}{c^{2} }

Establishing common denominator c^{2}, we have

\frac{6c}{c^{2} }+\frac{4}{c^{2}}

Combining the numerator and common denominator, we have

\frac{6c+4}{c^{2} }

Thus, the simplified expression of the given expression is \frac{6c+4}{c^{2} } which is obtained by taking a common denominator.

To learn more about simplified expression visit brainly.com/question/22860327

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