1 year ago

Written as a simplified polynomial in standard form, what is the result when (x+7)^2 is subtracted from7

1 answer:

8 0

7-(x^2+14x+49)

7-x^2-14x-49

-x^2-14x-42

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dlinn [17]

The answer is 208+200=408

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2 years ago

mrs_skeptik [129]

Answer: 3424.28

Step-by-step explanation:

Given data : 378, 361, 350, 375, 200, 391, 375, 368, 321

Number of data values = 9

Mean : $\overline{x}=\dfrac{\sum^n_{i=1} x_i}{n}$

$\\\\=\dfrac{378+361+350+375+200+391+375+368+321}{9}\\\\=\dfrac{3119}{9}\approx346.56$

Variance = $\dfrac{\sum^n_{i=1} (x_i-\overline{x})^2}{n-1}$

$\sum^n_{i=1} (x_i-\overline{x})^2 = (31.44)^2+(14.44)^2+(3.44)^2+(28.44)^2+(-146.56)^2+(44.44)^2+(28.44)^2+(21.44)^2+(-25.56)^2\\\\=27394.2224$

Variance = $\dfrac{27394.2224}{8}=3424.2775\approx3424.28$

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3 years ago

forsale [732]

It’s ten (I need more Characters)

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3 years ago

kaheart [24]

X + 44 is correct

X = AN UNKNOWN

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3 years ago

Ad libitum [116K]

Answer:

92.75 miles per 7 days

Step-by-step explanation:

13.25 mi/day times 7 days works out to 92.75 miles per 7 days.

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3 years ago