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Ganezh [65]
3 years ago
6

Me and brother are fighting abt the answer so we wanna know

Mathematics
2 answers:
Arturiano [62]3 years ago
8 0

Answer: 109

Step-by-step explanation: 45/3 = 15 (witch). 21/3 = 7 (wand). 12/3 = 4 (spoon). Then use PEMDAS. Multiplication comes first so, 15 x 7 = 105, then add 4. 109. Hope this helped :)

rusak2 [61]3 years ago
4 0

The answer to your question would be

<h2 /><h2>109</h2>
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Step-by-step explanation:

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3 years ago
A normal distribution has a standard deviation equal to 39. What is the mean of this normal distribution if the probability of s
Naily [24]

Answer:

The mean is \mu = 131

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

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:

\sigma = 39

What is the mean of this normal distribution if the probability of scoring above x = 209 is 0.0228?

This means that when X = 209, Z has a pvalue of 1-0.0228 = 0.9772. So when X = 209, Z = 2.

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

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209 - \mu = 2*39

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7 0
3 years ago
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SpyIntel [72]

Answer:

C. 272

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8 0
3 years ago
Read 2 more answers
Find AB when given angle B 64 degress angle C 75 degrese and side a 19
jeka94

Answer:

about 28

Step-by-step explanation:

you have to use the sine rule = side you know * ( sin of angle opposing the side you want to know / sin of angle opposing the side you know)

AB = 19* (sin 75/ sin ( 180 -75-64) )

AB = 19 * ( sin 75 / sin 41) ≈ 27.9739...

4 0
3 years ago
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