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goblinko [34]
3 years ago
8

HURRY PLEASE

Mathematics
2 answers:
dimaraw [331]3 years ago
8 0

Answer:

x=-3

Step-by-step explanation:

4x-2 = 8x+10

4x-2 (-8x) =8x+10 (-8x)

-4x-2=10

-4x-2 (+2)=10 (+2)

-4x = 12

-4x (divded by -4) = 12 (divided by -4)

x = -3

hope it is correct! and hope i helped

topjm [15]3 years ago
7 0
The answer would be -3
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Answer:

144.5

Step-by-step explanation:

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3 years ago
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
Teo has a combination of quarters, loonies, and toonies in his pocket.
finlep [7]

Answer:

343

Step-by-step explanation:

There are quarters(25¢), loonies ($1), and toonies ($2)

And total number of coins is 9

If loonies ($1), and toonies ($2) are one, then quarters(25¢) is 7

If quarters(25¢), and toonies ($2) are one, then loonies ($1)is 7

If loonies ($1), and quarters(25¢) are one, then toonies ($2) is 7

So possible number number of combination for an item that cost between $10 and $12 is

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= 343

hope this helps, stay safe :)

3 0
3 years ago
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Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
Could i please get some help?
stepladder [879]
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5: slope = 3/5
6: slope = 2/-8
7: slope = 6/2 or 3
8: slope = 2/-4
9: slope = 1/6
7 0
3 years ago
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