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DENIUS [597]
2 years ago
8

Ratio 400g : 1kg can be written in the form 1 : n find the value of n?

Mathematics
1 answer:
zvonat [6]2 years ago
8 0
400 : 1kg
400 : 1000
1 : 2.5

n = 2.5
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Comment

It's a good thing that the domain is confined or the graph is. That function is undefined if x < - 3 

At exactly x = - 3, f(x) = 0 and that's your starting point.

So look what happens to this graph. If x = 0, f(0) =  y = 3. So we are starting to see that as x get's larger so does f(x). The graph tells us that x = 0 is bigger than x = - 3.

Let's keep on plugging things in.
As x increases to 5, f(5) = 5. x = 5 is larger than x = 0, and f(5) > 3.

One more and then we'll start drawing conclusions. If x = 9 then f(9) = y =  6. 
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OK I think we should be ready to look at answers. There's nothing there that makes the answer anything but a. Let's find out what the problem is with the rest of the choices.

B
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C
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D
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The answer is A <<<< Answer.
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