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sladkih [1.3K]
3 years ago
15

If x is a number that is 7 more than y, how do you express x as a function of y

Mathematics
1 answer:
Soloha48 [4]3 years ago
5 0
x=y+7
.....
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A study of women’s weights found that a randomly selected sample of 234 women had a mean weight of 157.3 lb. Assuming that the p
Scilla [17]

Answer:

157.3-1.96\frac{15.6}{\sqrt{234}}=155.301    

157.3+1.96\frac{15.6}{\sqrt{234}}=159.299    

So on this case the 95% confidence interval would be given by (155.301;159.299)    

And the best option would be:

B. (155.3, 159,3)

Step-by-step explanation:

Information given

\bar X=157.3 represent the sample mean

\mu population mean (variable of interest)

\sigma =15.6 represent the population standard deviation

n=234 represent the sample size  

Confidence interval

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

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

The Confidence level is is 0.95 or 95%, the significance is \alpha=0.05 and \alpha/2 =0.025, the critical value for this case would be z_{\alpha/2}=1.96

And replacing we got:

157.3-1.96\frac{15.6}{\sqrt{234}}=155.301    

157.3+1.96\frac{15.6}{\sqrt{234}}=159.299    

So on this case the 95% confidence interval would be given by (155.301;159.299)    

And the best option would be:

B. (155.3, 159,3)

5 0
4 years ago
9.2=g+11.8 <br> 1-step equations
Otrada [13]

Answer:

g = 9.2 - 11.8 = -2.6

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A) A square has an area of 121 cm^2. What is the length of each side?
tia_tia [17]
A square has equal sides. To find the area, you multiply the length and the height.
x*x=121
x^2=121
x=11
The length of each side is 11

A square has equal sides. To find the perimeter, you add all the sides together.
x+x+x+x=28
4x=28
x=7
The length of each side is 7
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Does anyone do savvas realize
Aleksandr-060686 [28]

Answer:

Yes, I do for my Spanish class!

Do you have any questions about it?

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Which relation is a function
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The first one, the other graphs do not pass the Vertical line Test. they intersect at more than one point on the graph
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