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skelet666 [1.2K]
3 years ago
13

Help me out here pleaseeeeeeeee

Mathematics
1 answer:
ludmilkaskok [199]3 years ago
6 0

Answer:

Step-by-step explanation:

If Brenna has 5 candy bars and she wants to give 1/4 to a person,

she will give 1/4 to 20 people

one way to see it is by counting the bars

or

5/(1/4)=5*4=20

when you divide a fraction you multiply with the reciprocal

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3 years ago
How many ml of a 20% acid mixture and a 80% acid mixture should be mixed to get 120ml of a 35% acid mixture?
shutvik [7]

Answer:

Volume of Mixture A =90 ml

Volume of Mixture B =30 ml

Step-by-step explanation:

Let say, Mixture A + Mixture B = Mixture C

Volume of Mixture A is x

Volume of Mixture B is y

So, Volume of Mixture C is x+y = 120 ml

Now, Acid contain in Mixture A is 20% =0.2x

Acid contain in Mixture B is 80% =0.8y

Also, Acid contain in Mixture C is 35% =(0.35)(x+y) = 0.35×120=42

Now, we know that,

Acid contain of Mixture A + Acid contain of Mixture B=Acid contain of Mixture C

∴ 0.2x+0.8y=42

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2x+8y=420 and x+y = 120

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Replacing y value in any equation

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Thus,

Volume of Mixture A is x=90 ml

Volume of Mixture B is y=30 ml

3 0
3 years ago
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