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kumpel [21]
3 years ago
5

I need help on this please n-5>-2

Mathematics
1 answer:
Fofino [41]3 years ago
5 0

Answer:

I think that it is n<3

Step-by-step explanation:

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====================================

Explanation:

x = number of liters of the 50% alcohol solution

If we have x liters of 50% alcohol, then we have 0.50*x liters of pure alcohol. This is added to 0.90*40 = 36 liters of pure alcohol (from the 90% solution).

So far we have 0.50*x + 36. This expression represents the total amount of pure alcohol. We want a 70% solution, so we want 70% of the total 40+x meaning 0.50*x + 36 is to be set equal to 0.70*(40+x) and we solve for x as shown below

0.50*x + 36 = 0.70*(40+x)

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0.20x = 8

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x = 40

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