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madreJ [45]
3 years ago
12

Find b if the equation is w=2a+3b

Mathematics
1 answer:
Vlad1618 [11]3 years ago
3 0
There isn't enough information to know the exact number of b but

w=2a+3b
subtract 2a from both sides
2a-w=3b
divide both sides by 3
2a - w \div 3 = b
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Antonio had his hair cut at the salon. After he returned home, he realized he had accidentally tipped the stylist 114% of the co
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betty has 15 less than triple the number of points that jennie has. Write an expression to find how many points betty 1. has??
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8 0
2 years ago
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true or false If x represents a random variable with mean 114 and standard deviation 40, then the standard deviation of the samp
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Answer:

\mu = 114, \sigma = 40

We also know that we select a sample size of n =100 and on this case since the sample size is higher than 30 we can apply the central limit theorem and the distribution for the sample mean would be given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And the standard deviation for the sampling distribution would be:

\sigma_{\bar X}= \frac{40}{\sqrt{100}}= 4

So then the answer is TRUE

Step-by-step explanation:

Let X the random variable of interest and we know that the true mean and deviation for this case are given by:

\mu = 114, \sigma = 40

We also know that we select a sample size of n =100 and on this case since the sample size is higher than 30 we can apply the central limit theorem and the distribution for the sample mean would be given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And the standard deviation for the sampling distribution would be:

\sigma_{\bar X}= \frac{40}{\sqrt{100}}= 4

So then the answer is TRUE

6 0
3 years ago
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