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IrinaVladis [17]
2 years ago
12

The factorization of x² + 3x -4 is modeled with algebra

Mathematics
1 answer:
nydimaria [60]2 years ago
5 0
  • y=x²+3x-4
  • y=x²+4x-x-4
  • y=x(x+4)-1(x+4)
  • y=(x-1)(x+4)

Option C

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Step-by-step explanation:

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Previous Question Question 14 of 20 Next Question A company randomly surveys 15 VIP customers and records their customer satisfa
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Answer:

71.4699, 81.7301.

Step-by-step explanation:

So, the following are the scores: 74

90

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Let,\;the\;total\;sum\;of\;the\;scores\;be:\sum x =1149

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Then, let the size of the scores be n : 15.

Then, we have to find the mean.

                                      \bar{x}=\frac{\sum x}{n}

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Then,\;we\;have\;to\;find\;standard\;deviation:S=\sqrt{\frac{\sum x^2-n.(\bar{x})^2}{n-1} }

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The\;degree\;of\;freedom:n-1=14

So,\;the\;significant\;level:\alpha=1-0.90=0.10

and\;the\;critical\;value:t_{\frac{\alpha}{2} }=1.7613

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6 0
3 years ago
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