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Blababa [14]
4 years ago
12

21x+28=14 and 9x+12y=6

Mathematics
1 answer:
Westkost [7]4 years ago
7 0
<span>21x+28=14
x= -2/3 or -0.666666666

</span><span>9x+12y=6
x=2/3 or .666666666
y=0</span>
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Mortar is made by mixing cement, sand and quicklime in the ration 1:2:3
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Answer with step-by-step explanation:

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Cement: 1 x 0.35 = 0.35

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If you add it up, you will get 2.1, which is the volume.

Hope this helped! (brainliest please)

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3 years ago
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3 years ago
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6 0
3 years ago
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matrenka [14]

Answer:

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Step-by-step explanation:

Given

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Required

The coefficient of variation

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So, we have:

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3 years ago
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