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Mekhanik [1.2K]
3 years ago
9

Help me on what is meant by 2cm to represent 1unit on the graph and give me examples.

Mathematics
1 answer:
AURORKA [14]3 years ago
7 0
So it's a scale. On your graph, there should be units, or little squares made up of lines. For example, if you have a square that's one unit/line on each side, in real life it's going to be 2cm on each side. If you draw a square that's 4 lines/units on each side, it means that it's 8cm on each side, because that's 2cm for each little line.
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Look at picture. Does anybody know the answer I’m lost?
masha68 [24]

Let x,y be the dimensions of the rectangle. We know the equations for both area and perimeter:

A=xy=36

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x=9\pm3\sqrt{5}

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If we choose the negative solution, we have

x=9-3\sqrt{5} \implies y=18-x=18-9+3\sqrt{5}=9+3\sqrt{5}

So, we're just swapping the role of x and y. The two dimensions of the rectangle are 9+3\sqrt{5} and 9-3\sqrt{5}

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