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2 years ago

Solve Step By Step 3x² + 24y when x is 3 and y is 4

Mathematics

1 answer:

tia_tia [17]2 years ago

8 0

Step-by-step explanation:

Substitute 3 and 4 into the expression:

3(3)²+24(4)

Work it out:

3(3)²+24(4)=123

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Nimfa-mama [501]

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Step-by-step explanation:

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2 years ago

14/N = 7/4 , what is n

crimeas [40]

14/N= 14 divided by _____ = 1.75

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3 years ago

How to do the problem

trapecia [35]

Step-by-step explanation:

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2 years ago

In an effort to estimate the mean of amount spent per customer for dinner at a major Lawrence restaurant, data were collected fo

larisa86 [58]

Answer:

The 99% confidence interval for the population mean is 22.96 to 26.64

Step-by-step explanation:

Consider the provided information,

A sample of 49 customers. Assume a population standard deviation of $5. If the sample mean is $24.80,

The confidence interval if 99%.

Thus, 1-α=0.99

α=0.01

Now we need to determine $z_{\frac{\alpha}{2}}=z_{0.005}$

Now by using z score table we find that $z_{\frac{\alpha}{2}}=2.58$

The boundaries of the confidence interval are:

$\mu-z_{\frac{\alpha}{2}}\times \frac{\sigma}{\sqrt{n} }\\24.80-2.58\times \frac{5}{\sqrt{49}}=22.96\\\mu+z_{\frac{\alpha}{2}}\times \frac{\sigma}{\sqrt{n} }\\24.80+2.58\times \frac{5}{\sqrt{49}}=26.64$

Hence, the 99% confidence interval for the population mean is 22.96 to 26.64

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3 years ago

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you look for the slant height and the volume

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1 year ago