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3 years ago

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:

Step-by-step explanation:

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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).

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3 years ago