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irga5000 [103]
3 years ago
15

Which statement represents the number line shown?

Mathematics
2 answers:
Arada [10]3 years ago
7 0

Answer:

B

Step-by-step explanation:

open circle means no underline and it is past the 6 so it is B

TEA [102]3 years ago
6 0
The answer is A, x=6
explanation: look at the line and where it’s plotted, u can put your finger on it and you’ll see :) hope this helps
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Could y’all help me please please please
natka813 [3]

Answer:

Your answer is 12

Step-by-step explanation:

Start by multiplying 9 and 1 1/2. Then add 7 1/2. Now divide by 1 3/4

4 0
3 years ago
A bicycle store costs ​$2700 per month to operate. The store pays an average of ​$65 per bike. The average selling price of each
vladimir2022 [97]

Answer:$90

Step-by-step explanation:

how much they sell for $95 minus how much they cost $65 equals $30 then divid how much rent is $2700 by the $30 equals $90

or

$95-$65=$30

$2700÷$30=90

7 0
3 years ago
Flow meters are installed in urban sewer systems to measure the flows through the pipes. In dry weatherconditions (no rain) the
ziro4ka [17]

Answer:

a) \frac{(8)(30.23)^2}{20.09} \leq \sigma^2 \leq \frac{(8)(30.23)^2}{1.65}

363.90 \leq \sigma^2 \leq 4430.80

Now we just take square root on both sides of the interval and we got:

19.08 \leq \sigma \leq 66.56

b) For this case we are 98% confidence that the true deviation for the population of interest is between 19.08 and 66.56

Step-by-step explanation:

423.6, 487.3, 453.2, 402.9, 483.0, 477.7, 442.3, 418.4, 459.0

Part a

The confidence interval for the population variance is given by the following formula:

\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}

On this case we need to find the sample standard deviation with the following formula:

s=sqrt{\frac{\sum_{i=1}^8 (x_i -\bar x)^2}{n-1}}
And in order to find the sample mean we just need to use this formula:
[tex]\bar x =\frac{\sum_{i=1}^n x_i}{n}

The sample deviation for this case is s=30.23

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

df=n-1=9-1=8

The Confidence interval is 0.98 or 98%, the value of \alpha=0.02 and \alpha/2 =0.01, and the critical values are:

\chi^2_{\alpha/2}=20.09

\chi^2_{1- \alpha/2}=1.65

And replacing into the formula for the interval we got:

\frac{(8)(30.23)^2}{20.09} \leq \sigma^2 \leq \frac{(8)(30.23)^2}{1.65}

363.90 \leq \sigma^2 \leq 4430.80

Now we just take square root on both sides of the interval and we got:

19.08 \leq \sigma \leq 66.56

Part b

For this case we are 98% confidence that the true deviation for the population of interest is between 19.08 and 66.56

4 0
3 years ago
There are 2000 pounds in a ton how can you write 2000 with and exponent
Makovka662 [10]
In scientific notation, it would be 2x10^3.
An easy trick to help remember when it is a multiple of 10 is that you do the numbers that aren't zero (2) times 10 and the exponent is how ever many zeros there are after the other numbers (3).
3 0
3 years ago
Read 2 more answers
it rained for 7 days during the month of april . About what percent did it rain ( hint aprill has 30 days ) round to the nearst
oee [108]

Answer:

Convert fraction (ratio) 7 / 30 Answer: 23.333333333333%

Step-by-step explanation:

7 0
2 years ago
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