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LenaWriter [7]
3 years ago
5

4x + 2 = -18 slove for what is x

Mathematics
2 answers:
Veronika [31]3 years ago
7 0

Answer:4x + 2 = -18 slove for what is x

Step-by-step explanation:

Viktor [21]3 years ago
7 0

Answer:

X = 4

Step-by-step explanation:

1.) 4x + 2 = -18

subtract -2 on both sides

2.) 4x = 16

divide 4 on both sides

3.) X = 4

Best of luck :)

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Step-by-step explanation:

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What 30000.48978 rounded up
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A researcher compares the effectiveness of two different instructional methods for teaching electronics. A sample of 138 student
yan [13]

Answer:

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Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for the difference between population means is:

CI=(\bar x_{1}-\bar x_{2})\pm z_{\alpha/2}\times \sqrt{\frac{\sigma^{2}_{1}}{n_{1}}+\frac{\sigma^{2}_{2}}{n_{2}}}

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z_{\alpha/2}=z_{0.02/2}=2.326

Compute the 98% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 as follows:

CI=(\bar x_{1}-\bar x_{2})\pm z_{\alpha/2}\times \sqrt{\frac{\sigma^{2}_{1}}{n_{1}}+\frac{\sigma^{2}_{2}}{n_{2}}}

     =(61-64.6)\pm 2.326\times\sqrt{\frac{(18.53)^{2}}{138}+\frac{(13.43)^{2}}{156}}\\\\=-3.6\pm 4.4404\\\\=(-8.0404, 0.8404)\\\\\approx (-8.04, 0.84)

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Step-by-step explanation:

pls make a brainliest

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