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2 years ago

What is the value of z in the equation 3x + 5 = 4z - 8

Mathematics

1 answer:

antiseptic1488 [7]2 years ago

6 0

Z= (3x+13)/4

3x+5=4z-8
3x+5+8=4z-8+8
(3x+13)/4=4z/4
(3x+13)/4=z
or
Z= 13

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2 years ago

Stoplight a changes color every 30 seconds and stoplight b changes every 40 seconds. after how many seconds will the stoplights

andrey2020 [161]

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After 120 seconds

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Here, we want to know the number of seconds after which both spotlights will change colors at the same time again.

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2 years ago

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2 years ago

The results of a series of surveys revealed a population with a mean of 4.73 and a standard deviation of 0.865. If each survey h

satela [25.4K]

The given sample's confidence interval is 4.73 ± 0.1199, or from 4.61 to 4.85

<h3>What is the z score?</h3>

The z-score is a numerical assessment of a value's connection to the mean of a set of values, expressed in terms of standards from the mean, that is used in statistics.

Given data;

Mean = 4.73

Standard deviation = 0.865

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interval = 95%

Confidence interval=?

95% of samples contain the population mean (μ) within the confidence interval of 4.73 ± 0.1199.

Hence, the sample's confidence interval is 4.73 ± 0.1199, from 4.61 to 4.85

To learn more about the Z score, refer to;

brainly.com/question/15016913

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2 years ago