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Kryger [21]
3 years ago
13

To find how much money the average American family spends to cool their home, 100 Alaskan families are surveyed at random. Of th

e families, 85 said they spend less than $75.00 per month on cooling their homes. Based off that survey, the researcher concluded that the average AMERICAN family spends less than $75.00 per month on cooling their homes.
Is this conclusion valid or not valid?
Mathematics
1 answer:
zhenek [66]3 years ago
8 0

Answer:

Step-by-step explanation:

Statistically this is valid

But, in Alaska average daytime summer temperatures range from approximately 55 to 78 °F (12.8 to 25.6 °C); average daytime winter temperatures are about 5 to 30 °F (−15.0 to −1.1 °C). SO, they don't need cooling when compared to rest of the USA. Therefore this will not be valid.

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Irina-Kira [14]

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4 0
3 years ago
If
Dominik [7]

Answer:

SQR = 60

Step-by-step explanation:

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20=2x

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3 years ago
(2x + y)2 – (3x – 2y)2 + (x – 4y)(x + 4y<br>11​
Vinvika [58]

Answer:

Step-by-step explanation:

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(a- b)² = a² + b² - 2ab

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(a - b)(a +b) = a² - b²

(x - 4y(x + 4y) = x² - (4y)²

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(2x + y)² - (3x - 2y)² + (x - 4y)(x +4y)

  = 4x²  + y² + 4xy - (9x² + 4y² - 12xy) + x² - 16y²

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8 0
2 years ago
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Wewaii [24]

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For vertical scale factor "a" and vertex (h, k), the vertex form of the equation for a parabola can be written as ...

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If k is subtracted from this equation, an alternate form is ...

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This latter version of vertex form is the form your equation has, where ...

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7 0
3 years ago
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4 0
3 years ago
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