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3 years ago

9

Using the binomial theory, write down and simplify the terms of the expansion of (2+x)2 in ascending Powers of x.in step by step

1 answer:

yanalaym [24]3 years ago

7 0

Answer:

Step-by-step explanation:

hello :

by identity : (a+b)² = a²b² +2ab

when : a = 2 and b=x

(2+x)² = 2²+x²+2(2)(x) =4+x²+4x

(2+x)² = x²+4x+4

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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

∴ 2x+8y=420

We get two linear equations

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

Solving above equation...

∴ x=120-y

Replacing x value in 2x+8y=420

∴ 2(120-y)+8y=420

∴ 240-2y+8y=420

∴ 6y=180

∴ y=30

Replacing y value in any equation

∴ x=120-y=120-30=90

∴ x=90

Thus,

Volume of Mixture A is x=90 ml

Volume of Mixture B is y=30 ml

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4 years ago

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rewona [7]

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Step-by-step explanation:

Show in the photo attached.

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3 years ago

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navik [9.2K]

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Answer:

See Below (Isolate the variables)

Step-by-step explanation:

13) d = 4AM solve for M

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Multiply both sides by 6

A = 6( f+h)

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Add m to both sides

h - m = qb

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4 years ago

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S_A_V [24]

Answer:

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Step-by-step explanation:

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