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Oduvanchick [21]
3 years ago
14

1.

Mathematics
1 answer:
creativ13 [48]3 years ago
4 0
Let x represent the worth of the professional basketball player's autograph a year ago. Since his autograph's worth increased by 40% now, $364 is 1.40x. 
 
                                      364 = 1.40x

Solving for x gives x = 260.

Thus, the autograph of the basketball player was worth only $260 last year. 

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Answer:

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3 years ago
The mean test score in her upcoming class is 49, and the standard deviation is 20.7. The teacher wants to identify those student
QveST [7]

Answer:

Students who have z-scores above z = 2.00 are the ones who scored above 90.4.

Step-by-step explanation:

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.

The mean test score in her upcoming class is 49, and the standard deviation is 20.7.

This means that \mu = 49, \sigma = 20.7

Identify the test score corresponding to a z-score of above z=2.00.

As X increases, so does the z-score. So those scores are higher than X when Z = 2.

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

2 = \frac{X - 49}{20.7}

X - 49 = 2*20.7

X = 90.4

Students who have z-scores above z = 2.00 are the ones who scored above 90.4.

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3 years ago
The lines below are perpendicular. If the slope of the green line is 3/2, what is the slope of the red line?
lukranit [14]
 your answer would be 4/2
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