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mina [271]
3 years ago
7

the water is -2 degrees celsius. The water is 9 degrees celsius cooler than the water.How can that be written as an expression

Mathematics
1 answer:
RSB [31]3 years ago
6 0

did you look in your text book it is in


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Y varies inversely with x if y = 7 when x =-4, find y when x = 5​
marysya [2.9K]

Answer:

y = - \frac{28}{5}

Step-by-step explanation:

Given y varies inversely with x then the equation relating them is

y = \frac{k}{x} ← k is the constant of variation

To find k use the condition y = 7 when x = - 4, then

7 = \frac{k}{-4} ( multiply both sides by - 4 )

- 28 = k

y = \frac{-28}{x} ← equation of variation

When x = 5 , then

y = \frac{-28}{5} = - \frac{28}{5}

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Answer:

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Step-by-step explanation:

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omeli [17]
Let x and y represent the two angles.
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Subtract the second equation from the first.
.. (x +y) -(x -2y) = (90) -(15)
.. 3y = 75
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The smaller angle is 25 degrees.
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Step-by-step explanation:

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