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3 years ago

Which of the following statements best describes the location of −(−2) on a number line?

Mathematics

2 answers:

Vera_Pavlovna [14]3 years ago

7 0

Answer:

A. It is 2 units to the right of 0.

Step by step explanation

The given number is - (-2)

When we multiply negative by negative, we get positive.

-(-) = +

Therefore, -(-2) = 2 [By applying the sign rule of multiplication]

2 is nothing but 2 units to the right from 0.

Hence the answer is A. It is 2 units to the right of 0.

Hope you will understand the concept.

Thank you. :)

NeTakaya3 years ago

3 0

The answer is A because the negative on the outside if the parentheses cancels out the negative on the inside of the parentheses making it a positive and there is no other point given so it would be 2 units to the right if 0

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3 years ago

4. A solution of 60% fertilizer is to be mixed with a solution of 21% fertilizer to form 234 liters of a 43% solution. How many

solniwko [45]

Given:

A solution of 60% fertilizer is to be mixed with a solution of 21% fertilizer to form 234 liters of a 43% solution.

To find:

The quantity of the 60% solution in the mixture.

Solution:

Let x be the quantity of the 60% solution and y be the quantity of the 21% solution.

Quantity of mixture is 234. So,

$x+y=234$

$x=234-y$ ...(i)

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$\dfrac{60}{100}x+\dfrac{21}{100}y=\dfrac{43}{100}\times 234$

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$60x+21y=10062$ ...(ii)

Using (i) and (ii), we get

$60(234-y)+21y=10062$

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Divide both sides by -39.

$\dfrac{-39y}{-39}=\dfrac{-3978}{-39}$

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$x=234-102$

$x=132$

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