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Aleonysh [2.5K]
3 years ago
10

Which describes a method for solving systems of equations in which you

Mathematics
2 answers:
Jlenok [28]3 years ago
6 0

Answer:

it's not plug in method ik that much

Step-by-step explanation:

apex

zloy xaker [14]3 years ago
4 0

Answer: substitution method

Step-by-step explanation:

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Approximate the square root of 77
GarryVolchara [31]

Answer:

abt 8.77

Step-by-step explanation:

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Write a verbal expression for 6m-2
katrin2010 [14]

Answer: The difference of 6 times a number m and 2

Step-by-step explanation:

The way to write this expression is:

The difference of 6 times a number m and 2.

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Step-by-step explanation:

4 0
3 years ago
An analytical laboratory is asked to evaluate the claim that the concentration of the active ingredient in a specimen is 86%. Th
Olenka [21]

Answer:

Decision rule

   Reject null hypothesis

Conclusion

There is significance evidence that the true mean is different from 0.86

Step-by-step explanation:

From the question we are told that

  The population mean   \mu  = 0.86

   The  sample is  mean is \=  x  =  0.8708

  The standard deviation is  \sigma =  0.0068

The  level of significance is  \alpha  =  0.01

  The  sample size n =  3

The null hypothesis is  \mu =  0.86

The alternative hypothesis  is \mu \ne  0.86

Generally the test statistics is mathematically represented as  

    z =  \frac{\=  x  - \mu }{ \frac{\sigma}{\sqrt{n} } }

=> z =  \frac{ 0.8708 - 0.86 }{ \frac{0.0068}{\sqrt{3} } }

=>  z =  2.751  

Generally  p- value is mathematically represented as

       p-value =  2 P(z >2.751   )

From the z-table  

        P(z >2.751 ) =  0.0029707

So

     p-value =  2 *  0.0029707

=>   p-value =  0.00594

From the obtained question we see that  p-value  <  \alpha

Hence we reject the null hypothesis

 

6 0
3 years ago
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