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Mashcka [7]
3 years ago
9

I will give Brainliest to whoever can get here first!

Mathematics
1 answer:
USPshnik [31]3 years ago
5 0

Answer:

The answers would be as follows:

3

3

1

1

Step-by-step explanation:

We can tell that the first two have an infinite number of solutions because when we try to solve, we get a true statement. The first one is done for you below.

-6x + 7 = -6x + 7 ------> Add 6x to both sides

7 = 7 (TRUE STATEMENT)

We can tell the next two have no solution due to the fact that they develop a false statement when trying to solve.

-3x + 7 = 3x + 7 ----> Subtract 7 from both sides

-3x = 3x ---> Divide by 3

-x = x (UNTRUE STATEMENT)

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2 years ago
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FinnZ [79.3K]

Answer:

y = 3x +6

Step-by-step explanation:

6x-2y=-12

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2 years ago
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emmasim [6.3K]

Using the Central Limit Theorem, it is found that the standard deviation is of 0.0971.

<h3>What does the Central Limit Theorem states?</h3>
  • It states that for a proportion p in a sample of size n, the sampling distribution of sample proportion is approximately normal with mean \mu = p and standard deviation s = \sqrt{\frac{p(1 - p)}{n}}, as long as np \geq 10 and n(1 - p) \geq 10.
  • It also states that when two variables are subtracted, the standard deviation is the square root of the sum of the variances.

In this problem, for each sample, the standard error is given by:

s_I = \sqrt{\frac{0.25(0.75)}{50}} = 0.0612

s_{II} = \sqrt{\frac{0.35(0.65)}{40}} = 0.0754

Hence, for the distribution of differences, it is given by:

s = \sqrt{s_I^2 + s_{II}^2} = \sqrt{0.0612^2 + 0.0754^2} = 0.0971

More can be learned about the Central Limit Theorem at brainly.com/question/24663213

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