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Agata [3.3K]
3 years ago
9

Together Alex and Lily have 12 cats. If Alex has 3, write an equation to find out how many lily has.

Mathematics
2 answers:
zavuch27 [327]3 years ago
5 0

Answer:

12-3 lily has 9 cats

Step-by-step explanation:

nexus9112 [7]3 years ago
4 0

Answer:

9

Step-by-step explanation:

12 - 3 = 9

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2 years ago
Two quantities vary inversely. If the value of the first is 15 when the value of the second is 18, find the value of the second
vovikov84 [41]

Answer:

The value of second quantity is 27

Step-by-step explanation:

Inverse variation can be represented by the equation xy=k or y = \frac{k}{x} i.e,

y varies inversely as x , if there is some nonzero constant k such that, xy =k or y = \frac{k}{x} where  x≠0 and y≠0.

Given: Two quantities vary inversely.

Let x be the first quantity and y be the second quantity if they  vary inversely.

then, by definition of inverse variation;

y = \frac{k}{x}            .....[1]

Substitute the value of x=15 and y=18 to solve for k;

18= \frac{k}{15}

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y = \frac{270}{10}

Simplify:

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Therefore, the second quantity value i.e,y = 27



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3 years ago
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