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3 years ago

Plz help!! im working on systems of linear equations...

Mathematics

1 answer:

ipn [44]3 years ago

7 0

Answer:

Write the problem as comment I dont understand what it means. So I mean just copy it Ill wait for you.

Step-by-step explanation:

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The sum of one and the product of a number and two is thirteen

Zigmanuir [339]

Answer:

2x + 1=13

Step-by-step explanation:

the product of a number and 2 (2x)

sum of 1 (+1)

is 13 (=13)

6 0

3 years ago

Im just giving out points whats 2+1

omeli [17]

Answer:

Step-by-step explanation:

3 mah fwend omg so hard my brain hurts

4 0

3 years ago

Read 2 more answers

It is known that the population variance equals 484. With a .95 probability, the sample size that needs to be taken to estimate

Hitman42 [59]

Answer:

The minimum sample size is n = 75 so that the desired margin of error is 5 or less.

Step-by-step explanation:

We are given the following in the question:

Population variance = 484

Standard deviation =

$\sigma^2 = 484\\\sigma =\sqrt{484} = 22$

Confidence level = 0.95

Significance level = 0.05

Margin of error = 5

Formula:

Margin of error =

$E = z\times \dfrac{\sigma}{\sqrt{n}}\\\\n = (\dfrac{z\times \sigma}{E})^2$

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

Putting values, we get

$E\leq 5\\\\1.96\times \dfrac{22}{\sqrt{n}} \leq 5\\\\\sqrt{n} \geq 1.96\times \dfrac{22}{5}\\\\n \geq (1.96\times \dfrac{22}{5})^2\\\\n \geq 74.373$

Thus, the minimum sample size is n = 75 so that the desired margin of error is 5 or less.

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2 years ago

Which is a memory strategy?

scZoUnD [109]

Answer:

one memory strategy is looking at your notes twice a day and adding or taking away from them, highlighting helps a lot

i hope i helped bebe

Step-by-step explanation:

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3 years ago

Write these numbers in order of size.

daser333 [38]

Answer:

ummmmm..... ykw I cant do that but I will give out free brainly points sooo ya (on a question)

Step-by-step explanation:

5 0

3 years ago