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Tcecarenko [31]
2 years ago
10

Pls help will give points

Mathematics
1 answer:
laiz [17]2 years ago
8 0

Answer:

6I a missed opportunity for this one and a missed period in hindi and I think its aaaaaaaeeeeeeee

Step-by-step explanation:

hhhhgggggg and in a statement to be more of the story

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If b(x) = -2(x​​-50), what is the value of b(20)?
Alex777 [14]

Answer:

60

Step-by-step explanation:

-2(20​​-50)

-40 + 100 = 60

8 0
2 years ago
Miley drove 288 miles in 4 1/2 hours.what was mileys average speed in miles per hour?
Norma-Jean [14]
1/2 of an hour is = 30
288 / 4.30=67
The answer is 67 miles per hour.

8 0
3 years ago
Suppose that many large samples are taken from a population and that the
rewona [7]

Answer:

0.22 -1 *0.029 =0.191

0.22 +1 *0.029 =0.249

And the best option would be:

D. (0.191 to 0.249)

Step-by-step explanation:

For this case we know that the mean is:

\bar X = 0.22

And the standard error is given by:

SE = 0.029

We want to construct a 68% confidence interval so then the significance level would be :

\alpha=1-0.68 = 0.32 and \alpha/2 =0.16. The confidence interval is given by:

\bar X \pm z_{\alpha/2} SE

Now we can find the critical value using the normal standard distribution and we got looking for a quantile who accumulate 0.16 of the area on each tail and we got:

z_{\alpha/2}= 1

And replacing we got:

0.22 -1 *0.029 =0.191

0.22 +1 *0.029 =0.249

And the best option would be:

D. (0.191 to 0.249)

5 0
3 years ago
For the 405 highway that car pass through a checkpoint, assume the speeds are normally distributed such that μ= 61 miles per hou
Strike441 [17]

Answer:

Z = 1

Step-by-step explanation:

Z - score

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 61, \sigma = 4

Calculate the Z value for the next car that passes through the checkpoint will be traveling slower than 65 miles per hour.

This is Z when X = 65. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{65 - 61}{4}

Z = 1

4 0
3 years ago
Round 7/12 to the nearest hundredth
Naddik [55]

Answer:

7.00

Step-by-step explanation:

so you have to round to the narest 0.01 the easy way to do it is round to the hundreth place. And you will get your answer which is 7.00

8 0
3 years ago
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