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devlian [24]
4 years ago
15

Stanley wants to know how many students in his school enjoy watching talk shows on TV. He asks this question to all 24 students

in his history class and finds that 55% of his classmates enjoy watching talk shows on TV. He claims that 55% of the school's student population would be expected to enjoy watching talk shows on TV. Is Stanley making a valid inference about his population?
Mathematics
1 answer:
Korolek [52]4 years ago
8 0
No. He surveys 24 students from only one class. This is not a significant percentage or sample of the school population. He should survey multiple classes from multiple grades.
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3 years ago
Harry is trying to solve the equation y = 2x2 − x − 6 using the quadratic formula. He has made an error in one of the steps belo
professor190 [17]

Answer:

Step 2

Step-by-step explanation:

The quadratic formula is given by x=-b+-\frac{\sqrt{b^{2}-4ac } }{2a}

Our equation is y = 2x²-x-6

So here our a = 2, b = -1, and c = -6

We can now plug these numbers into our formula

x= -(-1) +-\frac{\sqrt{(-1)^{2}-4(2)(-6) } }{2(2)} = 1 +-\frac{\sqrt{1+24} }{4} = 1+-\frac{\sqrt{25} }{4}

Step 2 is incorrect because it states that "x equals the negative of negative 1 plus or minus the square root of negative one plus forty-eight all over two times 2."

The correct statement would be "x equals the negative of negative 1 plus or minus the square root of positive one plus forty-eight all over two times 2.", because the square of a negative is positive, resulting in a positive one.

Since this step is incorrect, the steps after are also incorrect, but Harry went wrong at Step 2

4 0
3 years ago
On any given day, Buffy is either cheerful (c), so-so (s), or gloomy (g). If she is cheerful today, then she will be c, s, or g
zysi [14]

Answer:

0.7

Step-by-step explanation:

The matrix of possibility is given by the table below

Therefore the proportion of time Buffy is cheerful is 0.7

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3 years ago
What is the value of x? Show all of your work. Round your answer answer to the nearest tenth.
AlexFokin [52]
The answer is 13.1
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DetermIne the inverse function of f(x) = 1/3 + 6 <br> Please show work
yawa3891 [41]

Answer:

f(x)⁻¹ = 3x - 18

Step-by-step explanation:

I'm going to assume that 1/3 is the coefficient of the x.

f(x) = 1/3x + 6

y = 1/3x + 6

x = 1/3y + 6

x - 6 = 1/3y

3x - 18 = y

f(x)⁻¹ = 3x - 18

8 0
3 years ago
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