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kari74 [83]
2 years ago
7

Vineet solved a system of equations by substitution. In his work, he substituted an expression for one of the variables and solv

ed for the value of the other. This resulted in the equation 7 = 9. What can Vineet conclude? The solution to the system is (7, 9). The system of equations does not have a solution. The work must be incorrect because it is not possible to get this equation. The system of equations has infinitely many solutions.
Mathematics
2 answers:
mezya [45]2 years ago
10 0
Vineet can conclude that:
B ) the system of equations does not have a solution.
antiseptic1488 [7]2 years ago
8 0

Answer:

Vineet solved a system of equations by substitution. In his work, he substituted an expression for one of the variables and solved for the value of the other. This resulted in the equation 7 = 9. What can Vineet conclude?

A)The solution to the system is (7, 9).

CORRECT ON ED2020 B)The system of equations does not have a solution.

C)The work must be incorrect because it is not possible to get this equation.

D)The system of equations has infinitely many solutions.

Step-by-step explanation:

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Complete Question

The complete qustion is shown on the first uploaded image

Answer:

The correct option is B

Step-by-step explanation:

From the question we are told that

      The sample size  is  n = 49

       The mean is  \mu  =  17ppb

       The standard deviation is \sigma =  14 ppb

Generally the standard error of this measurement is mathematically represented as

       \sigma_z  =  \frac{\sigma}{\sqrt{n} }      

substituting values

      \sigma_{\= x}  =  \frac{14}{\sqrt{49} }  

     \sigma_{\= x}  =  2ppb

Now the probability that the mean lead level from the sample of 49 measurements T is less than 15 ppb represented as P(X < 15 )

Next is to find the z value

    z =  \frac{\mu -\sigma }{\sigma_{\= x}}

     z =  \frac{15-17}{2}

      z =  -1

Now checking the z-table for the z-score of  -1 we have  

      P(X

                       

       

     

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The following indicates the number of hours that Johnny spent playing video games the week before each exam in his classes along
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Step-by-step explanation:

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I'm pretty sure the answer will be 6/10





Hope this helps, best of luck, terribly sorry if I'm wrong if I am my  apologies




~Animaljamissofab ♥

5 0
2 years ago
Read 2 more answers
Please help me on this question
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    -4 = 8m + 18n
-18n = 8m + 4
 /-18    /-18  /-18
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