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Naddika [18.5K]
2 years ago
10

If a 7% saline solution and a 4% saline solution are mixed to make 500 milliliters of a 5% saline solution, how much of each sol

ution, to the nearest milliliter, is needed?
Mathematics
1 answer:
Bogdan [553]2 years ago
3 0
 <span>The answer is 167 milliliters of 7% solution and 333 milliliters of 4% solution x + y = 500 x = 500 - y 0.07x + 0.04y = 25 (substitute 500 - y for x) 0.07(500 - y) + 0.04y = 25 35 - 0.07y + 0.04y = 25 -0.03y + 35 = 25 -0.03y = -10 y = 333.333... y [ = about 333 x = 500 - y = 500 - 333 = 167 hope it helps </span>
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3 years ago
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7nadin3 [17]

Answer:

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7 0
3 years ago
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7 0
2 years ago
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How many photons with 10 ev are required to produce 20 joules of energy?
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