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motikmotik
3 years ago
14

3 L of water of density 1 gram per centimetre cubed is added to 12litres of alcohol of density of 0.8 gram per centimetre cubed,

find the density of the mixture.​
Mathematics
1 answer:
Natasha2012 [34]3 years ago
4 0

Answer:

84%

Step-by-step explanation:

each liter is 1000 cubic centimetre, so you have a total density of 3000, but instead think of 3 liters being 100% density and think of alcohol as 80% density, there are 4 times at much 80% than 100% liquid.

with 3 liters of alcohol, 3 liters of water is now 90% density or 0.9 gram per centimetre. add another 3 liters and it is 2/3, so the grams per centimetre would be 8.66667 or 8 2/3's

if you add another 3 liters, THEN it is 85%

add 12 liters in total and the final answer 84%

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Romashka [77]

Answer:

a) the midpoint is (1.5, 2.5)

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Suppose we have two values, A and B, the mid-value between A and B is:

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Now, if we have a segment with endpoints (a, b) and (c, d), the midpoint will be in the mid-value of the x-components and the mid-value of the y-components, this means that the midpoint is:

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Now we want to find the equation of a perpendicular line to our segment, that passes through the point (1.5, 2.5).

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y = a*x + b

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y = -(7/3)*x + 6

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3 years ago
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