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kenny6666 [7]
3 years ago
14

Can someone simplify 2y-3x^2+6x^2-3y ?

Mathematics
2 answers:
ahrayia [7]3 years ago
8 0
2y - 3x^2 + 6x^2 - 3y
Bring like terms together:-
6x^2 - 3x^2 + 2y - 3y
= 3x^2 - y   <-----  Answer

statuscvo [17]3 years ago
5 0
2y-3x^2+6x^2-3y  combine like terms

3x^2-y
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3 years ago
A manager records the repair cost for 4 randomly selected stereos. A sample mean of $82.64 and standard deviation of $14.32 are
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Answer:

CI = (70.861 , 94.418)

Step-by-step explanation:

In order to determine the 90% confidence interval you use the following formula (for a population approximately normal):

CI=(\overline{x}-Z_{\alpha/2}\frac{\sigma}{\sqrt{n}},\overline{x}+Z_{\alpha/2}\frac{\sigma}{\sqrt{n}})    (1)

\overline{x}: mean = 82.64

σ: standard deviation = 14.32

n: sample = 4

α: tail area = 1 - 0.9 = 0.1

Z_α/2 = Z_0.05: Z factor =  1.645

You replace these values and you obtain:

Z_{0.05}(\frac{14.32}{\sqrt{4}})=(1.645)(\frac{14.32}{\sqrt{4}})=11.778

The confidence interval will be:

CI=(82.64-11.778,82.64+11.778)=(70.861,94.418)

The 90% confidence interval is (70.861 , 94.418)

6 0
3 years ago
_ _ means that information that is presented is complete, neutral and free from error
Sedbober [7]
Faithful representation information that is complete, neutral, and free from error
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3 years ago
Allen opens a retirement savings account with an initial deposit of $5,000. He makes annual contributions to the account, and at
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Answer:

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Step-by-step explanation:

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3 0
3 years ago
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315 divided by 9 = 35 hours
3 0
3 years ago
Read 2 more answers
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