3 years ago

Find the value of x.

Mathematics

1 answer:

madreJ [45]3 years ago

3 0

Answer:

Step-by-step explanation

x=40 because if you time these in like this:

3(40)-10= 110

40+15=55

If you user 65 it'll be wrong because:

3(65)-10=185

And the whole thing is only 180 :]

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The u.s. department of health and human services collected sample data for 772 males between the ages of 18 and 24. that sample

soldier1979 [14.2K]

The 99% confidence interval for the true mean is given by:

$\bar{x}\pm z_{\alpha/2} \frac{\sigma}{\sqrt{n}}$

where:

$\bar{x}$ is the sample mean = 69.7
$\sigma$ is the standard deviation = 2.8
$z_{\alpha/2}$ is the test statistics = 2.58 for for 99% confidentce interval.
n is the sample size = 772.

Therefore, the 99% confidence interval is:

$69.7\pm2.58\left( \frac{2.8}{\sqrt{772}} \right)=69.7\pm2.58(0.1008) \\ \\ =69.7-0.26\leq\mu\leq69.7+0.26 \\ \\ =69.44\leq\mu\leq69.96$

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3 years ago

Read 2 more answers

A bag contains 15 coins consisting of quarters and dimes. The total value of the coins is $2.55. Which system of equations can b

denis23 [38]

Answer: d+q= 2.55

or d=15+q

I believe this is how you do it

Step-by-step explanation:

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3 years ago

What is 29/11 as a decimal