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klio [65]
2 years ago
8

Need this quickly!! im not good in math so .

Mathematics
2 answers:
goldenfox [79]2 years ago
6 0
Okininam to man agnanayon
oksano4ka [1.4K]2 years ago
5 0
In algebra, symbols are used to represent numbers. Example: 5x=20 or 4x=24
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A study was designed to investigate the effects of two variables​(1) a​ student's level of mathematical anxiety and​ (2) teachin
dimaraw [331]

Using Chebyshev's Theorem, considering a standard deviation of 40, we have that at least 75% of the students scored between 360 and 520.

<h3>What does Chebyshev’s Theorem state?</h3>

When we have no information about the population distribution, Chebyshev's Theorem is used. It states that:

  • At least 75% of the measures are within 2 standard deviations of the mean.
  • At least 89% of the measures are within 3 standard deviations of the mean.
  • An in general terms, the percentage of measures within k standard deviations of the mean is given by 100(1 - \frac{1}{k^{2}}).

In this problem, considering a standard deviation of 40, we have that:

440 - 2 x 40 = 360.

440 + 2 x 30 = 520.

Within 2 standard deviations of the mean, no information about the distribution, hence, at least 75% of the students scored between 360 and 520.

More can be learned about Chebyshev's Theorem at brainly.com/question/25303620

7 0
2 years ago
Rewrite these problems using a negative exponent, ill give brainliest
Ira Lisetskai [31]

Answer:

I have made it in above picture hope it helps

8 0
3 years ago
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Estimate 200 times 3
Sonja [21]

I "estimate" 600....?


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3 years ago
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Which represents a quadratic function? ​
netineya [11]

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b is the answer

Step-by-step explanation:

f(x) = ax^2 + bx + c

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What's the answer to this questions?
tia_tia [17]
I believe the answer is 2 :) .
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