It is given that varies directly as . when x+2 , y=16, find the value of when x=6 .

Step-by-step explanation:

Question :

Given:

varies directly with

when

To find value of   when

Solution:

From the given data we have:

∝

Thus, we have:

where is the constant of proportionality.

We can find the value of by plugging in the given values.

when

Dividing both sides by 2.

∴

So, the equation to find when will be:

Thus, when (Answer)

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answer: d.) the total number of protons and neutrons is 15

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