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Tresset [83]
2 years ago
11

12(13−14)−15=16+x+4 What is the value of x?

Mathematics
1 answer:
svlad2 [7]2 years ago
8 0
First, distribute the 12
156-168-15=16+4+x
-27=20+x
-47=x
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<em>75%</em>

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Anastaziya [24]

Answer:

a) 22497.7 < μ< 24502.3

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Step-by-step explanation:

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The margin of error (e) is given as:

e= z_{0.005}\frac{\sigma}{\sqrt{n} }  = 2.57*\frac{3900}{\sqrt{100} } =1002.3

The 99% confidence interval = (μ - e, μ + e) = (23500 - 1002.3, 23500 + 1002.3) =  (22497.7, 24502.3)

Confidence interval = 22497.7 < μ< 24502.3

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3 years ago
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3 0
2 years ago
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