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4 years ago

I need help on this problem please help me.

Mathematics

1 answer:

a_sh-v [17]4 years ago

3 0

Answer:

150 mL

Step-by-step explanation:

Let x represent the quantity of 75% solution needed. The total amount of alcohol in the 60% mixture will be ...

75%·x + 10%·45 = 60%·(x+45) . . . . . there will be x+45 mL of solution in the end

0.15x = 22.5 . . . . . . . . . . . . . . . . . . . . simplify, subtract .60x+4.5

22.5/0.15 = x = 150 . . . . . . . . . . . . . . mL of 75% solution needed

You will need 150 mL of the 75% solution.

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Nutka1998 [239]

Answer:

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Step-by-step explanation:

To know the population growth it is important to know what it contributes to its growth and that it decreases it.

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Now it only remains to add those that increase growth and subtract those that decrease, like this:

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3 years ago

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gogolik [260]

I think u need to add a pic

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3 years ago

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forsale [732]

Answer:

Option b.

Step-by-step explanation:

Consider the below figure attached with this question.

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Answer:

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3 years ago

Read 2 more answers