3 years ago

Please help 20 points

Mathematics

2 answers:

s2008m [1.1K]3 years ago

6 0

The correct answer would be 5,195.41

professor190 [17]3 years ago

5 0

Answer:

should be 5195.41

Step-by-step explanation:

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Temka [501]

Answer:

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Step-by-step explanation:

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If K = (AB)/(A+B) , then B = ?

marysya [2.9K]

Lets do

$\\ \sf\longmapsto K=\dfrac{AB}{A+B}$

$\\ \sf\longmapsto \dfrac{1}{K}=\dfrac{A+B}{AB}$

$\\ \sf\longmapsto \dfrac{1}{K}=\dfrac{1}{A}+\dfrac{1}{B}$

$\\ \sf\longmapsto \dfrac{1}{B}=\dfrac{1}{K}-\dfrac{1}{A}$

$\\ \sf\longmapsto \dfrac{1}{B}=\dfrac{K-A}{AK}$

$\\ \sf\longmapsto B=\dfrac{AK}{K-A}$

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alexdok [17]

Answer:

Step-by-step explanation:

let the number be n , then

$\frac{1}{4}$ n + $\frac{1}{8}$ n = 12 ( multiply through by 8 to clear the fractions )

2n + n = 96

3n = 96 ( divide both sides by 3 )

n = 32

The number is 32

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