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madreJ [45]
3 years ago
6

PLS HELP ASAP IS FOR A TEST I REALLY NEED YALL HELP Ill mark Brainliest to correct answer

Mathematics
1 answer:
Helga [31]3 years ago
3 0

Answer:50x-4Step-by-step explanation:

1x^7+1x^5+8x^4+2x^3-4

7x+5x+32x+6x-4

50x-4

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For the 405 highway that car pass through a checkpoint, assume the speeds are normally distributed such that μ= 61 miles per hou
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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

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