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elena55 [62]
3 years ago
9

Can anyone help me with this and explain it too?

Mathematics
1 answer:
arlik [135]3 years ago
7 0

Answer:

(6, 3)

Step-by-step explanation:

Midpoint (x_{m},y_{m})=(\frac{x_A + x_B}{2}, \frac{y_A + y_B}{2})\\\\=(\frac{3 + 9}{2}, \frac{6 + 0}{2})\\\\=(\frac{12}{2}, \frac{6}{2})\\\\Midpoint of a line segment (x_M, y_M) = (6, 3)

How to Calculate Midpoint?

The x-coordinate of the midpoint M of the segment \overline{AB} is the arithmetic mean of the x-coordinates of the endpoints of the segment  \overline{AB}. Similarly, the y-coordinate of the midpoint M of the segment  \overline{AB} is the arithmetic mean of the y-coordinates of the endpoints of the segment  \overline{AB}.

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A candidate for one of Ohio's two U.S. Senate seats wishes to compare her support among registered voters in the northern half o
Radda [10]

Answer:

(0.531-0.45) - 1.96 \sqrt{\frac{0.531(1-0.531)}{2000} +\frac{0.45(1-0.45)}{2000}}=0.050  

(0.531-0.45) + 1.96 \sqrt{\frac{0.531(1-0.531)}{2000} +\frac{0.45(1-0.45)}{2000}}=0.112  

And the best option for this case would be:

A. 0.050 to 0.112.

Step-by-step explanation:

Data given

p_A represent the real population proportion of who support the cnadite for the northern half state  

\hat p_A =\frac{1062}{2000}=0.531 represent the estimated proportion of who support the candidate for the northern half state  

n_A=2000 is the sample size required the northern half state  

p_B represent the real population proportion of who support the candidate for the southern half state  

\hat p_B =\frac{900}{2000}=0.45 represent the estimated proportion of people who support the candidate for the southern half state  

n_B=2000 is the sample size for the northern half state  

z represent the critical value

The confidence interval for the difference of two proportions would be given by this formula  

(\hat p_A -\hat p_B) \pm z_{\alpha/2} \sqrt{\frac{\hat p_A(1-\hat p_A)}{n_A} +\frac{\hat p_B (1-\hat p_B)}{n_B}}  

For the 95% confidence interval the value of \alpha=1-0.95=0.05 and \alpha/2=0.025, with that value we can find the quantile in the normal standard distribution and we got.  

z_{\alpha/2}=1.96  

Replacing into the formula we got:

(0.531-0.45) - 1.96 \sqrt{\frac{0.531(1-0.531)}{2000} +\frac{0.45(1-0.45)}{2000}}=0.050  

(0.531-0.45) + 1.96 \sqrt{\frac{0.531(1-0.531)}{2000} +\frac{0.45(1-0.45)}{2000}}=0.112  

And the best option for this case would be:

A. 0.050 to 0.112.

8 0
2 years ago
2.394 multiplied by 7.489
Oxana [17]
Ok the correct answer is.........17.928666
5 0
2 years ago
Which of the following is equivalent to (8 – 5) ÷ 23 ?
Mrrafil [7]

Answer:

none

Step-by-step explanation:

(8-5)=3

8-5÷23

=179/23

3 0
1 year ago
Steve likes to snowboard. It takes him 120 minutes to climb to the top of the mountain, 5 minutes to get ready to go, and 10 min
arlik [135]
120+10+5=135
I don't know if all you're supposed to do is add or not... so i may be wrong....
8 0
3 years ago
Read 2 more answers
Solve for x. Round to the nearest tenth, if necessary.
natka813 [3]

Answer:

25.5

Step-by-step explanation:

first find angle E.

remember, all angles in a triangle always add up to 180 degrees.

E = 180 - 90 - 20 = 70 degrees

now we use the law of sines.

ED/sin(20) = DC/sin(70) = EC/sin(D)

EC = x

sin(D) = sin(90) = 1

24/sin(70) = x/1 = x

x = 25.5

8 0
2 years ago
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