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andre [41]
3 years ago
13

A piece of paper is randomly selected from a stack that contains 15 small, 44 large, and 20 extra large pieces.

Mathematics
1 answer:
Gre4nikov [31]3 years ago
6 0
C.

(A=wrong | 44/79=.557)
(B=wrong | 15/79=.19)
(C=correct | 20/79=.253)
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Find all values of the variable
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The values of x for which the rational expression is undefined are -6 and -8.

<h3>What is a function?</h3>

It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.

We have a rational function:

\rm f(x) = \dfrac{3x+20}{x^2+14x+48}

As we know in the rational function denominator cannot be zero:

The values of x for which the rational expression is undefined.

x² + 14x + 48 = 0

\rm x_{1,\:2}=\dfrac{-14\pm \sqrt{14^2-4\cdot \:1\cdot \:48}}{2\cdot \:1}

\rm x_1=\dfrac{-14+2}{2\cdot \:1},\:x_2=\dfrac{-14-2}{2\cdot \:1}

x = -6, -8


Thus, the values of x for which the rational expression is undefined are -6 and -8.

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brainly.com/question/5245372

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