Mathematics: By what number can you divide a rational number to get a number that is twice the opposite of the rational number

By what number can you divide a rational number

realneggalloyd

12.03.2022

Let the rational number be $\frac{x}{y}$ .

If we divide this rational number by a factor k, then it becomes $\frac{x}{ky}$ .

We need to find 'k'.

Now, twice the opposite of the given rational number is $\frac{-2x}{y}$

By the given information,

$\frac{x}{ky} =\frac{-2x}{y}$

xy = -2kxy

-2k = 1

$k = -\frac{1}{2}$

Hence, we should divide the given rational number by $-\frac{1}{2}$ .

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Bg88860709

25.06.2022

L ACB = 25 ( L at centre = 2× L at circumference)

prove

sum = 75

centre = 50

then L AOB +ACB = 75

50 + L ACB =75

L ACB = 75 - 50

then L ACB= 25

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