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3 years ago

1. (-4,5) (3,-5) In slope intercept form 2. (-3,4) (-2,-2) Slope intercept form

Mathematics

1 answer:

Sophie [7]3 years ago

8 0

Step-by-step explanation:

first use the formula box slope m then use y intercept equestion

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A mountain climber explored a cliff that is 225 yard high in 5 equal trips. how many yards was one trip?

Mamont248 [21]

It is 225/5 which equals 45

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3 years ago

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Step-by-step explanation:

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3 years ago

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pashok25 [27]

Answer:

-10, -11, -13, -15, -20

t≤-10

Step-by-step explanation:

Start by solving for t

-8t≥80

t≤ -10

(we flip the inequality sign because we are dividing by a negative)

Then just select all the numbers that are less than or equal to 10

-10, -11, -13, -15, -20

The equivalent inequality is what we solved for

t≤-10

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3 years ago

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estim

pogonyaev

Answer:

$n=\frac{0.5(1-0.5)}{(\frac{0.025}{1.28})^2}=655.36$

And rounded up we have that n=656

Step-by-step explanation:

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 80% of confidence, our significance level would be given by $\alpha=1-0.80=0.20$ and $\alpha/2 =0.10$ . And the critical value would be given by:

$z_{\alpha/2}=\pm 1.28$

Solution to the problem

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

Since we don't have prior info for the proportion of interest we can use $\hat p=0.5$ as estimator. And on this case we have that $ME =\pm 0.025$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

And replacing into equation (b) the values from part a we got:

$n=\frac{0.5(1-0.5)}{(\frac{0.025}{1.28})^2}=655.36$

And rounded up we have that n=656

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3 years ago

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djverab [1.8K]

There will be 3 seats on the last one.

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3 years ago