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3 years ago

What is the sum of any number and its opposite?

1 answer:

8 0

It’s 0.

Because when you add a number by it’s opposite your just adding or subtracting that same value.

n+(-n)

n=5

5-5=0

n=-3

-3+3=0

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How much is 3%from $600.85

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This is a problem in which the percentage and the actual amount are both given. Only thing to do is convert the percentage to amount.
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elena-s [515]

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below

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2 years ago

Convert the fraction 7 24 into a repeating decimal.

goldenfox [79]

$\dfrac7{24}=\dfrac6{24}+\dfrac1{24}=\dfrac14+\dfrac1{24}$

$\dfrac1{24}=\dfrac1{8\time3}=\dfrac a8+\dfrac b3=\dfrac{3a+8b}{24}$
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We can choose $a=-1$ and $b=\dfrac12$ , so that

$\dfrac1{24}=-\dfrac18+\dfrac16$

Recalling that $\dfrac13=0.333\ldots$ , it follows that $\dfrac16=0.166\ldots$ . So,

$\dfrac1{24}=0.125+0.166\ldots=0.04166\ldots$
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3 years ago