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BlackZzzverrR [31]
3 years ago
14

Simplify 2(5+3x) + (x+10)

Mathematics
1 answer:
xz_007 [3.2K]3 years ago
8 0

Answer:

7x + 20

I hope I helped :D

Step-by-step explanation:

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Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. Whe
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Answer:

The value  is  n = 384

The correct option is a

Step-by-step explanation:

From the question we are told that

   The margin of error is  E =  0.05

From the question we are told the confidence level is  95% , hence the level of significance is    

      \alpha = (100 - 95 ) \%

=>   \alpha = 0.05

Generally from the normal distribution table the critical value  of   is  

   Z_{\frac{\alpha }{2} } =  1.96

Generally since the sample proportion is not given we will assume it to be

      \^ p = 0.5

Generally the sample size is mathematically represented as  

    n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )

=>   n = [\frac{ 1.96 }{0.05} ]^2 *0.5 (1 - 0.5)

=>   n = 384

Generally the margin of error is mathematically represented as  

      E = Z_{\frac{\alpha }{2} } *  \frac{\sigma }{\sqrt{n} }

Generally if the level of confidence increases,  the critical value of  \frac{\alpha }{2}  increase and from the equation for margin of error we see the the critical  value varies directly with the margin of error , hence the margin of error  will increase also  

So  If the confidence level is increased, then the sample size would need to increase because a higher level of confidence increases the margin of error.

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Simplificando a expressão (3x^2 + 5x - 2) + (x^2 - 2x - 1) , vamos obter :
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You have to add all the common terms together.

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Photo attached <br><br> A. -2<br> B. -1<br> C. 1/-2<br> D. 1/2
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Step-by-step explanation:

(X1,Y1) = (-2,2)

(X2,Y2) = (0,1)

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m = (1 - 2)/(0 - (-2))

m = -1/2

The answer is C.

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The answer is 4.23 the second meteorite wieghts 4.23 pounds
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The first number is x axis while the second is y

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