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snow_tiger [21]
4 years ago
11

9 × ( 5 + 2 ) = ( 9 × _ ) + ( 9 × _ )???

Mathematics
1 answer:
MrRa [10]4 years ago
7 0

Answer:63


Step-by-step explanation:

9×(5+2)=63 ✨

(9×4)+(9×3)=63✨

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Please don't take this down, I genuinely do not understand it!
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3 years ago
On a particular stretch of highway, the State Police know that the average speed is 62 mph with a standard deviation of 5 mph. O
makkiz [27]

Using the <u>normal distribution and the central limit theorem</u>, it is found that there is a 0% probability of a sample of 50 cars recording an average speed of 66 mph or higher.

In a normal distribution with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

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

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In this problem:

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The probability of a sample of 50 cars recording an average speed of 66 mph or higher is <u>1 subtracted by the p-value of Z when X = 66</u>, hence:

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

Z = \frac{66 - 62}{0.7071}

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Z = 5.66 has a p-value of 1.

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There is a 0% probability of a sample of 50 cars recording an average speed of 66 mph or higher.

A similar problem is given at brainly.com/question/24663213

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