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Mamont248 [21]
3 years ago
14

If a scientist mixed 20% saline solution with 70% saline solution to get 10 gallons of 30% saline solution, how many gallons of

20% and 70% solutions were mixed?
Mathematics
1 answer:
Nana76 [90]3 years ago
4 0
60% yes 12344748498383
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scoundrel [369]

Answer:

1

16-7-(2×4)

16-7-(8)

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3 years ago
Which of the following conditions must be met in order to make a statistical inference about a population based on a sample
klasskru [66]

Answer:

For this case if we want to conclude that  the sample does not come from a normally distributed population we need to satisfy the condition that the sample size would be large enough in order to use the central limit theoream and approximate the sample mean with the following distribution:

\bar X \sim (\mu, \frac{\sigma}{\sqrt{n}})

For this case the condition required in order to consider a sample size large is that n>30, then the best solution would be:

n>= 30

Step-by-step explanation:

For this case if we want to conclude that  the sample does not come from a normally distributed population we need to satisfy the condition that the sample size would be large enough in order to use the central limit theoream and approximate the sample mean with the following distribution:

\bar X \sim (\mu, \frac{\sigma}{\sqrt{n}})

For this case the condition required in order to consider a sample size large is that n>30, then the best solution would be:

n>= 30

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Solve for x 2\3x =-1
zhuklara [117]

Answer:

x = -(3/2)

Step-by-step explanation:

i'm going to assume that the left side is (2/3)x and not 2/(3x). If so let me know and i'll change it.

(2\3)x =-1   (multiply both sides by 3)

2x = -1 (3)

2x = -3  (divide both sides by 2)

x = (-3) / 2

x = -(3/2)

6 0
3 years ago
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