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inysia [295]
3 years ago
10

Question 3 find the x -intercept(s) and the coordinates of the vertex for the parabola

Mathematics
1 answer:
Olegator [25]3 years ago
3 0

is there a picture? if there is I cant see it


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Which expression should you simplify to find the 90% confidence interval,
bogdanovich [222]

Answer:

0.45 - 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.2870.45 + 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.613

we can conclude at 95% of confidence that the true proportion of interest for this case is between 0.287 and 0.613

Step-by-step explanation:

The estimated proportion of interest is \hat p=0.45

We need to find a critical value for the confidence interval using the normla standard distributon. For this case we have 95% of confidence, then the significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025.

And the critical value is:z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The confidence interval for the true population proportion is interest is given by this formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

Replacing the values provided we got:

0.45 - 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.287\\\\0.45 + 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.613

And we can conclude at 95% of confidence that the true proportion of interest for this case is between 0.287 and 0.613

5 0
3 years ago
What is the answer to this problem -2b+6=-2b-2b?
TEA [102]
6 = -2b (cancel -2b on both sides)

6/-2 = b (divide both sides by -2)

-3 = b (simplify 6/2 to 3)

now switch sides

Answer: b = -3
8 0
3 years ago
How do I find the length of AB?
Anit [1.1K]
I assume #3 is 19 because the slope of the line is still the same. 
Hope this is right and it helps! I'm not very sure though. 
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3 years ago
How Many Squares does the Below given picture. <br> Thanks.
zalisa [80]

Answer:

10

Step-by-step explanation:

6 0
3 years ago
Given that cos theta = -12/13 and theta is in the second quadrant, find this function. sin theta=​
elena-14-01-66 [18.8K]
5/13

The x value is negative (second quadrant). 13 is the hypotenuse. So the missing side is 13^2 = (-12)^2 + y^2.

Sin theta is the opposite (5) over hypotenuse (13).
3 0
3 years ago
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