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Gnom [1K]
2 years ago
9

5.(A.3A) The table represents some points on the graph

Mathematics
1 answer:
Lilit [14]2 years ago
7 0

Answer:

3

Step-by-step explanation:

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Solve 4x − 2(x + 1) = 3x + 10. (5 points)
Dmitry [639]

Answer:

x=-12

Step-by-step explanation:

4x-2x-2=3x+10

2x-2=3x+10

 +2 =3x+12

2x=3x+12

-3x=12

-x=12

x=-12

4 0
2 years ago
Assume that the histograms below represent the amount of time it took two different groups of 100 people to run at a 5k race. As
Effectus [21]
I have know idea I would just guess if I were you

Explanation
6 0
3 years ago
Find the distance between the two points in simplest radical form.<br> (-9,3) and (-3,-5)
pentagon [3]

Answer:

wekl..................................

Step-by-step explanation:

5 0
3 years ago
10.
Kay [80]

Answer:

\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}

4.535 \leq \sigma^2 \leq 7.602

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

2.2 \leq \sigma \leq 2.8

And the best option would be:

A.  2.2 < σ < 2.8

Step-by-step explanation:

Information provided

\bar X=32.1 represent the sample mean

\mu population mean  

s=2.4 represent the sample standard deviation

n=83 represent the sample size  

Confidence interval

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}}

The degrees of freedom are given by:

df=n-1=83-1=82

The Confidence is given by 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.05, the critical values for this case are:

\chi^2_{\alpha/2}=62.132

\chi^2_{1- \alpha/2}=104.139

And replacing into the formula for the interval we got:

\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}

4.535 \leq \sigma^2 \leq 7.602

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

2.2 \leq \sigma \leq 2.8

And the best option would be:

A.  2.2 < σ < 2.8

3 0
3 years ago
The cost of a jacket was originally 40$ It was on sale for 20% how much did they save
ASHA 777 [7]

Answer:

$9

Step-by-step explanation:

In this circumstance, 20% off is the original number (40) divided by 5, and that's the answer. I hope this helps!

7 0
2 years ago
Read 2 more answers
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