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rodikova [14]
3 years ago
12

Which expression is equal to 9

Mathematics
1 answer:
FinnZ [79.3K]3 years ago
6 0
I'm not exactly sure what the question is, but I hope this helps!

9x1=9
3+6=9
2+7=9
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The mean family income for a random sample of 600 suburban households in Loganville shows that a 95 percent confidence interval
Misha Larkins [42]

Answer:

43100 \leq \mu \leq 59710

And for this case we want to test the following hypothesis:

Null hypothesis: \mu =42000

Alternative hypothesis: \mu \neq 42000

For this case since the lower value of the confidence interval is higher than 42000 we have enough evidence to reject the null hypothesis at the 55 of significance and we can conclude that the true mean is significantly different from 42000

Step-by-step explanation:

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

And for this case the 95% confidence interval is already calculated as:

43100 \leq \mu \leq 59710

And for this case we want to test the following hypothesis:

Null hypothesis: \mu =42000

Alternative hypothesis: \mu \neq 42000

For this case since the lower value of the confidence interval is higher than 42000 we have enough evidence to reject the null hypothesis at the 55 of significance and we can conclude that the true mean is significantly different from 42000

7 0
3 years ago
Which expressions have a value of -64? Check all that apply. NEED HELP ASAP PLSSS!!!
ziro4ka [17]

Answer: -(1/4)^3

Step-by-step explanation:

Equals -1/64 which is -64

6 0
2 years ago
If you are driving 20 meters per second, what would be the equivalent of that in miles per hour?
melomori [17]

\frac{20 meters}{1 second}  \frac{60 seconds}{1 minute}  \frac{60 minutes}{1 hour}

the fractions are set up so that each unit cancels out until its only meters/hour

you can multiply all the numerators together to get 72000 and all the denominators to get 1

72000 meters/1 hour

72000 meters in 1 hour

hope this helped

8 0
3 years ago
Which statement about rational and irrational numbers is always true?
DIA [1.3K]

Answer:

D.Any irrational number added to any irrational number is equal to a rational number.

5 0
3 years ago
Q. What do "zeros" represent?<br> HELPP
Bas_tet [7]

Answer:

The one your mouse is on

Step-by-step explanation:

4 0
3 years ago
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