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marta [7]
3 years ago
11

How much of 30% HCI and 45% HCI would be needed to mix and produce 50 liters of 35% HCI

Mathematics
1 answer:
VladimirAG [237]3 years ago
5 0

Answer:

  • 33 1/3 liters of 30%
  • 16 2/3 liters of 45%

Step-by-step explanation:

Let x represent the liters of 45% solution needed. Then the amount of HCl in the mix is ...

  0.45x +0.30(50 -x) = 0.35(50)

  0.15x = 0.05(50) . . . . . simplify, subtract 0.30(50)

  x = (0.05/0.15)(50) = 50/3 = 16 2/3 . . . liters of 45% HCl

33  1/3 liters of 30% and 16 2/3 liters of 45% HCl are needed.

_____

<em>Comment on the solution</em>

You may notice that the general solution to a mixture problem of this sort is that the fraction of the mix that is the highest contributor is ...

  (mix % - low %) / (high % - low %) = (.35 -.30) / (.45 -.30) = .05/.15 = 1/3

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3 years ago
Who could help me please and thank you
kondor19780726 [428]

Answer:

"The expression represents a cubic polynomial with 3 terms. The constant term is -10, the leading degree is 3, and the leading coefficient is (-1/6)"

Step-by-step explanation:

We have the expression:

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First, what does that expression represents?

As al the powers of x are positive numbers, we can see that this is a polynomial, and the largest power is 3, so this is a polynomial of degree 3, also called a cubic polynomial.

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The terms are the things separated by + or - symbols, is easy to see that there are 3 terms.

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The leading coefficient is the coefficient that multiplies the term with the largest power of x, in this case, we can rewrite:

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the leading coefficient is:

(-1/6)

There is a part of the statement that I can't read, i suppose that there says:

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Then the complete statement is:

"The expression represents a cubic polynomial with 3 terms. The constant term is -10, the leading degree is 3, and the leading coefficient is (-1/6)"

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3 years ago
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HACTEHA [7]

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Answer:

7(k−37)=26

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k= 285/7

Decimal Form: 40.714286

​

3 0
3 years ago
Read 2 more answers
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