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Lena [83]
3 years ago
15

X= ? The trainable a below are similar

Mathematics
1 answer:
ratelena [41]3 years ago
6 0

\frac{x + 7}{3x + 3}  =  \frac{19}{38} \\ \Leftrightarrow  \frac{x + 7}{3x + 3}  =  \frac{1}{2}  \\ \Leftrightarrow 2x + 14 = 3x + 3 \\ \Leftrightarrow x = 11

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=<br> 2<br> у<br> when x = 21<br> y=3* + 20
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Answer:

Step-by-step explanation:

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3 years ago
4.37) A set of data whose histogram is extremely skewed yields a mean and standard deviation of 70 and 12, respectively. What is
Brums [2.3K]

Answer:

75%

88.89%

Step-by-step explanation:

Given :

Mean = 70

Standard deviation = 12

Since the data is said to be extremely skewed, we apply Chebyshev's theorem rather than the empirical rule :

The minimum proportion of observation between 46 and 94

Chebyshev's theorem :

1 - 1 / k²

k = number of standard deviations from the mean

k = (94 - 70) / 12 = 24 / 12 = 2

Hence, we have ;

1 - 1/2²

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Hence, The minimum proportion of observation between 46 and 94 is 75%

Between 36 and 106 :

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k = 36/12 = 3

Hence,

1 - 1/3² = 1 - 1/9 = 8/9 = 0.8888 = 88.89%

The minimum proportion of observation between 34 and 106 is 88.89%

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3 years ago
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What are the coordinates of point A?<br><br> A. (5,4)<br> B. (4,5)<br> C. (4,6)<br> D. (6,4)
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The answer is A . (5,4)
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