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Lunna [17]
2 years ago
13

Factorise 3

tex-formula">+5x+2
Mathematics
1 answer:
PilotLPTM [1.2K]2 years ago
5 0
(x+1)x(3x+2) is the answer
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A radio station claims that the amount of advertising per hour of broadcast time has an average of 13 minutes and a standard dev
zimovet [89]

Answer:

Z = 3.33

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 question:

\mu = 13, \sigma = 1.2

You listen to the radio station for 1​ hour, at a randomly selected​ time, and carefully observe that the amount of advertising time is equal to 17 minutes. Calculate the​ z-score for this amount of advertising time.

We have to find Z when X = 17. So

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

Z = \frac{17 - 13}{1.2}

Z = 3.33

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3 years ago
How to find an equivalent fraction of 36/48 with numerator 9
Kobotan [32]

Answer:

9/12

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You have to divide 36 by 4 to get 9 and then divide 48 by 4 and you will get 12.

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