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3 years ago

Function not a function ?

Mathematics

1 answer:

luda_lava [24]3 years ago

3 0

Answer:

not a function

Step-by-step explanation:

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I buy 6 CDs costing £6.99.<br> How much change do I get from<br> £50?

gizmo_the_mogwai [7]

Answer:

subtract the 6.99 from 50 and you get your answer

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Solve the inequality. Graph the solution.<br><br> −8≤z+6.4<br> The solution is

Oksi-84 [34.3K]

Solve the inequality. Graph the solution.

−8≤z+6.4
The solution is

5 0

3 years ago

The following data show the average retirement ages for a random sample of workers in the United States and a random sample of w

SSSSS [86.1K]

Answer:

$t \approx 2.639$

Step-by-step explanation:

Given

$\begin{array}{ccc}{} & {USA\ 1} & {Japan\ 2} & {\bar x} & {64.6} & {67.5} &{n} & {30} & {30} & {\sigma} & {4.0} & {4.5} \ \end{array}$

See attachment for data

Required

Determine the test statistic

The test statistic is calculated using:

$t = \frac{\bar x_1 - \bar x_2}{\sqrt{\frac{\sigma_1^2}{n_1} + \frac{\sigma_2^2}{n_2}}}$

So, we have:

$t = \frac{64.6 - 67.5}{\sqrt{\frac{4.0^2}{30} + \frac{4.5^2}{30}}}$

$t = \frac{64.6 - 67.5}{\sqrt{\frac{16.00}{30} + \frac{20.25}{30}}}$

$t = \frac{64.6 - 67.5}{\sqrt{\frac{16.00+20.25}{30}}}$

$t = \frac{64.6 - 67.5}{\sqrt{\frac{36.25}{30}}}$

$t = \frac{-2.9}{\sqrt{1.2083}}$

$t = \frac{-2.9}{1.099}$

$t \approx -2.639$

The absolute value is:

$t \approx 2.639$

3 0

3 years ago

Anybody up???? <br> If so can someone help me with my math please?

iris [78.8K]

Answer:

what questions do u need help with?

Step-by-step explanation:

8 0

3 years ago

The CEO of a local tech company wants to estimate the proportion of employees that are pleased with the cleanliness of the break

Setler [38]

The type of sampling method proposed is a <u>convenience sampling</u> because it's a non-probability sampling method.

<h3>What is convenience sampling?</h3>

Convenience sampling can be defined as a type of non-probability sampling method which involves surveying and selecting representatives that are easily accessible.

The CEO could implement the second sampling method as follows:

Assign a serial number to each employees of the total 4,700 employee names.

Use a random number generator software to obtain 600 random numbers.

The 600 random numbers in Step 2 above forms the desired sample of 600 employees out of 4,700 employees at the company.

Read more on convenience sampling here: brainly.com/question/1445924

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8 0

2 years ago