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3 years ago

Here are six number cards.

Mathematics

1 answer:

Natalija [7]3 years ago

8 0

Answer:

The three pairs are

-4 and 8

-2 and 6

-1 and 5

Step-by-step explanation:

The correct question is

Here are six number cards.

-4 -2 -1 5 6 8

Arrange the cards into three pairs with the same total.

step 1

Find the first pair

I take the numbers

-4 and 8

Adds the number to find out the total

-4+8=4

step 2

Find the second pair

I take the numbers

-2 and 6

Adds the number to find out the total

Remember that the total must be equal to the total of the first pair

-2+6=4 ---> is ok

step 3

Find the third pair

The remaining numbers are

-1 and 5

Check the sum

Remember that the total must be equal to 4

-1+5=4 ---> is ok

therefore

The three pairs are

-4 and 8

-2 and 6

-1 and 5

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3 years ago

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weeeeeb [17]

Answer:

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~**Will mark brainliest **~ For the correct answers to all three questions

aleksandr82 [10.1K]

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$\dfrac{21}{32}\cdot\dfrac{39}{120}\cdot\dfrac{40}{65}=\dfrac{21}{32}\cdot\dfrac{3\cdot13}{2\cdot2\cdot2\cdot3\cdot5}\cdot\dfrac{2\cdot2\cdot2\cdot5}{5\cdot13}=\\\\\\=\dfrac{3\cdot7}{32}\cdot\dfrac{13}{2\cdot2\cdot2\cdot5}\cdot\dfrac{2\cdot2\cdot2}{13}=\dfrac{21}{32}\cdot\dfrac{1}{5}\cdot\dfrac{1}{1}=\dfrac{21}{160}$

$\dfrac{15}{90}\cdot\dfrac{36}{75}\cdot\dfrac{27}{42}=\dfrac{3\cdot5}{2\cdot3\cdot3\cdot5}\cdot\dfrac{2\cdot2\cdot3\cdot3}{3\cdot5\cdot5}\cdot\dfrac{3\cdot3\cdot3}{2\cdot3\cdot7}=\\\\\\=\dfrac{1}{2\cdot3}\cdot\dfrac{2\cdot2\cdot3}{5\cdot5}\cdot\dfrac{3\cdot3}{2\cdot7}=\dfrac{1}{1}\cdot\dfrac{2}{5\cdot5}\cdot\dfrac{3\cdot3}{2\cdot7}=\dfrac{1}{25}\cdot\dfrac{9}{7}=\dfrac{9}{175}$