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maks197457 [2]
3 years ago
15

Surri solved the equation x ^ 2 equals 49 and found that x equals 7 what error did Suro make

Mathematics
2 answers:
prohojiy [21]3 years ago
8 0
He spelled his name wrong. Just kidding. 

I don't think he did anything  wrong.

7^2= 49.

If you need anymore help, let me know.

Brainliest answer would be appreciated. 
denpristay [2]3 years ago
7 0
It does not look like Suro even made an error. She took the square root of both sides to get x = 7, I don't see any problem here.
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3 years ago
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Answer:

The margin of error (E)  =0.49

Step-by-step explanation:

Given,

 mean \bar{x}=6.88

 standard deviation \sigma=1.90

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90\% \quad \text{confidence interval}

Critical value =\frac{z_\alpha}{2}\quad \quad\quad[\because\;\alpha=1-\text{confidence interval}]  

                                                =1-0.90

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Critical value =\frac{z_{0.1}}{2}

                      =z_{0.05}

                      =1.645

The margin of error (E)  =\frac{z_\alpha}{2} \times\frac{\sigma}{\sqrt{n} }

                                       =1.645\times\frac{1.90}{\sqrt{41} }

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Hence, The margin of error (E) =0.49

Complete question is attached in below.

                     

7 0
3 years ago
Use the net to find the surface area of the cylinder. 6ft and 7ft
earnstyle [38]

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:0

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Step-by-step explanation:

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