What adds to 6 and multiplies to 18

2 answers:

8 0

I'm confused. I assumed you meant two numbers that add together to equal 6, and multiply to equal 18. So, the multiples of 18 are 1 & 18, 2 & 9, 3 & 6. But, none of these add to equal 6. Could you clarify what you want?

kirill115 [55]3 years ago

7 0

That has to be impossible because you can’t get any solution that would possible add to 6

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Solution:

Time varies inversely as rate of motion

Let "t" be the time required

Let "r" be the rate of motion

Then, we get

$t \propto \frac{1}{r}\\\\t = k \times \frac{1}{r}\\\\t = \frac{k}{r} -------- eqn 1$

Where, "k" is the constant of proportionality

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Substitute t = 3 and r = 56 in eqn 1

$3 = \frac{k}{56}\\\\k = 3 \times 56\\\\k = 168$

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Substitute t = 4 and k = 168 in eqn 1

$4 = \frac{168}{r}\\\\r = \frac{168}{4}\\\\r = 42$

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3 years ago

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