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11Alexandr11 [23.1K]
3 years ago
13

Please help mee :’( I will give brainliest :-)

Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
3 0
9 should be the correct answer please give brainlests
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Eric earns $15 per hour at his job. Write an equation that shows the
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15y=x

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Show that the triangles are similar and write a similarity statement.
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the circle is a square so that means a triangle is a circle

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Why is the square root of 29 irrational?
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Read 2 more answers
1. IQ scores of statistics students have a standard deviation less than 15. A. H0:σ≤15, H1:σ>15 B. H0:σ≥15, H1:σ<15 C. H0:
grandymaker [24]

Answer:

1) For this case we want to check if the population deviation is less than 15( alternative hypothesis) and the system of hypothesis are:

H0: \sigma \geq 15

H1: \sigma

B. H0:σ≥15, H1:σ<15

2) For this case we want to check if the population mean \mu is at most 70000 (alternative hypothesis) and the system of hypothesis are:

H0: \mu \geq 70000

H1: \mu

C. H0:µ≥70,000, H1:µ<70,000

3) For this case we want to check if the population proportion p of all internet users that make online purchases is higher than 0.5 (alternative hypothesis) and the system of hypothesis are:

H0: p \leq 0.5

H1: p >0.5

D. H0:p≤0.5, H1:p>0.5

Step-by-step explanation:

Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".  

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".  

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".  

Solution to the problem

1) For this case we want to check if the population deviation is less than 15( alternative hypothesis) and the system of hypothesis are:

H0: \sigma \geq 15

H1: \sigma

B. H0:σ≥15, H1:σ<15

2) For this case we want to check if the population mean \mu is at most 70000 (alternative hypothesis) and the system of hypothesis are:

H0: \mu \geq 70000

H1: \mu

C. H0:µ≥70,000, H1:µ<70,000

3) For this case we want to check if the population proportion p of all internet users that make online purchases is higher than 0.5 (alternative hypothesis) and the system of hypothesis are:

H0: p \leq 0.5

H1: p >0.5

D. H0:p≤0.5, H1:p>0.5

7 0
3 years ago
What is X if X + 2/3 = 9/10?
laiz [17]

Answer:

x=\frac{7}{30}

Step-by-step explanation:

Given the following question:

x+\frac{2}{3} =\frac{9}{10}

In order to find the answer to this question we need to subtract 9/10 from 2/3. To do this we need to find the common denominator, and then subtracting the numerators.

\frac{9}{10} -\frac{2}{3}
\frac{9}{10} \times3=\frac{27}{30}
\frac{2}{3} \times10=\frac{20}{30}
27-20=7=\frac{7}{30}
x=\frac{7}{30}

Hope this helps.

4 0
2 years ago
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