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Serjik [45]
3 years ago
10

A + 5 = -5a + 5 what does x equal

Mathematics
1 answer:
antoniya [11.8K]3 years ago
7 0

Answer:

a = 0

Step-by-step explanation:

a + 5 = -5a + 5      subtract 5 from both sides

a + 5 - 5 = -5a + 5 - 5

a = -5a                add 5a to both sides

a + 5a = -5a + 5a

6a = 0                 divide both sides by 6

6a / 6  =  0 / 6

therefore,

a = 0

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A data set includes 103 body temperatures of healthy adult humans having a mean of 98.9degreesf and a standard deviation of 0.67
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Answer:

Step-by-step explanation:

Confidence interval is written in the form,

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The sample mean, x is the point estimate for the population mean.

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From the information given, the population standard deviation is unknown hence, we would use the t distribution to find the z score

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Since confidence level = 99% = 0.99, α = 1 - CL = 1 – 0.99 = 0.01

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z = 2.6249

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Confidence interval = 98.6 ± 0.173

This suggests that the mean body temperature could very possibly be

98.6degrees°F.

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