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alexira [117]
3 years ago
9

If -3x = 57, what is the value of x?

Mathematics
2 answers:
laiz [17]3 years ago
8 0

Answer:

X= -19

Step-by-step explanation:

hope this helps

kozerog [31]3 years ago
7 0

Answer:

-19

Step-by-step explanation:

-3x=57

Divide by -3

-3x/-3=57/-3

x=57/-3

x=-19

Hope this helps plz hit the crown :D

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Step-by-step explanation:

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Sergio [31]

Answer:

The 99% confidence interval would be given (11.448;14.152).

Step-by-step explanation:

1) Important concepts and notation

A confidence interval for a mean "gives us a range of plausible values for the population mean. If a confidence interval does not include a particular value, we can say that it is not likely that the particular value is the true population mean"

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The confidence interval for the mean would be given by this formula

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For the 99% confidence interval the value of \alpha=1-0.99=0.01 and \alpha/2=0.005, with that value we can find the quantile required for the interval in the normal standard distribution.

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