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Leno4ka [110]
3 years ago
12

Divide: (4x10^5)/(5x10^2)

Mathematics
1 answer:
Vladimir [108]3 years ago
8 0

Answer:

<h2>800</h2>

Step-by-step explanation:

\dfrac{4\cdot10^5}{5\cdot10^2}=\dfrac{4}{5}\cdot\dfrac{10^5}{10^2}=0.8\cdot10^{5-2}=0.8\cdot10^3=0.8\cdot1,000=800\\\\\\\text{Used}\ \dfrac{a^m}{a^n}=a^{m-n}

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Alice purchased 4 1⁄2 kilograms of olive oil for $27. What is the price per kilogram?
Ede4ka [16]
<h3>Answer: 6 dollars per kilogram</h3>

=====================================================

Explanation:

The mixed number 4 & 1/2 converts to the decimal form 4.5

The unit price is 27/(4.5) = 6 dollars per kilogram

------

If you wanted, you can think of it like this ratio

4.5 kg : 27 dollars

Dividing both parts of that ratio by 4.5 will lead to

1 kg : 6 dollars

8 0
3 years ago
What is x^2+x-20=0. <br> please help
zepelin [54]
X² + x - 20 = 0

x² = x * x
x = the sum of the factors of -20
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(x - 4)(x + 5) = x(x+5) - 4(x+5) = x² + 5x - 4x - 20 = x² + x - 20

x - 4 = 0
x = 4

x + 5 = 0
x = -5
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4 years ago
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What lesson is this ?
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andrew-mc [135]

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Reptile [31]

Answer:

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Step-by-step explanation:

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