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snow_lady [41]
3 years ago
14

4 (x+2) = 2x+10 help

Mathematics
1 answer:
xenn [34]3 years ago
6 0

Answer:

x=1

Step-by-step explanation:

First you would do the parentheses.

So, 4 x X= 4x

4x2=8

4x+8=2x+10

subtract 2x on both sides

2x+8=10

subtract 8 from both sides

2x=2

x=1

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How much is 3 over 15 plus 1 over 3
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The weights of 67 randomly selected axles were found to have a variance of 3.85. Construct the 80% confidence interval for the p
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Answer:

3.13

Step-by-step explanation:

We are given the following in the question:

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We have to find 80% confidence interval for the population variance of the weights.

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Chi square critical value for lower tail =

\chi^2_{1-\frac{\alpha}{2}}= 51.770

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80% confidence interval:

\dfrac{(n-1)S^2}{\chi^2_{\frac{\alpha}{2}}} < \sigma^2 < \dfrac{(n-1)S^2}{\chi^2_{1-\frac{\alpha}{2}}}

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