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3 years ago

The sum of a number and 19 is at least 8.2.

Mathematics

2 answers:

labwork [276]3 years ago

8 0

Well the equation for this is = x+19>=8.2

tatuchka [14]3 years ago

7 0

X = a number which is the sum | it says and so that's + 19 is at least 8.2 so this means is = to 8.2. Your equation should be set up like this : x+19=8.2.

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Step-by-step explanation:

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Tems11 [23]

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3 years ago

A/ab-bsquare + b/ab-asquare?

lord [1]

Answer:

$\dfrac{(a+b)}{ab}$

Step-by-step explanation:

The given expression is :

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It can be solved as follows :

$\dfrac{a}{ab-b^2}+\dfrac{b}{ab-a^2}=\dfrac{a}{b(a-b)}+\dfrac{b}{a(b-a)}\\\\=\dfrac{a}{b(a-b)}+\dfrac{b}{-a(-b+a)}\\\\=\dfrac{1}{a-b}(\dfrac{a}{b}-\dfrac{b}{a})\\\\=\dfrac{a^2-b^2}{ab(a-b)}\\\\=\dfrac{(a-b)(a+b)}{ab(a-b)}\\\\=\dfrac{(a+b)}{ab}$

So, the solution of the given expression is equal to $\dfrac{(a+b)}{ab}$ .

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3 years ago