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3 years ago

WIL GIVE BRAINLIEST!

Mathematics

1 answer:

Grace [21]3 years ago

5 0

Answer: 4x - 13

<h2>Step-by-step explanation: </h2>

<em>First, we need to get triple of x:</em>

Triple of x is: 3x

<em>Next is to get the difference between 3x and 13:</em>

x + 3x -13

4x - 13

Hence, the variable expression is 4x - 13

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We have to calculate a 95% confidence interval for the standard deviation σ and the variance σ².

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