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IrinaVladis [17]
2 years ago
13

Find the solutions of this quadratic. f(x)=(x-8)(x+4)

Mathematics
1 answer:
Studentka2010 [4]2 years ago
3 0

l

x1 = 8  \\ x2 =  - 4

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The recommended single dose for a particular drug is 100 mg. How many doses can be obtained from 20 grams of the drug?
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Answer:

B. 200 doses

Step-by-step explanation:

Given,

1 dose is required for 100 mg,

Since, 1 mg = 0.001 g,

⇒ 100 mg = 0.1 g

⇒ 1 dost is required for 0.1 g,

Thus, the ratio of doses and quantity ( in gram ) is \frac{1}{0.1}=10

Let x be the doses required for 20 grams,

So, the ratio of doses and quantity is \frac{x}{20}

\implies \frac{x}{20}=10

\implies x=200

Hence, 200 doses can be obtained from 20 grams of the drug.

Option 'B' is correct.

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Marat540 [252]

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Pull out like factors

  2x + 24  =   2 • (x + 12)

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Step-by-step explanation:

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