3 years ago

BC is parallel to DE. What is the length of BC?A. 8B. 7C. 6D. 9

Mathematics

2 answers:

Liula [17]3 years ago

4 0

A. 10-2=8. Hope this helps.

netineya [11]3 years ago

3 0

The length is A. I would think . I hope this helps

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The average (arithmetic mean) of y numbers is x. if 30 is added to the set of numbers, then the average will be x - 5. what is t

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Given,

AM of y numbers = x.

Let the sum of y numbers be s.

AM of y numbers = x

$\frac{s}{y} = x$

$s = y*x$

Given, when 30 is added to the y numbers, the AM becomes x - 5.

$\frac{s + 30}{y + 1} = x - 5$

$\frac{y*x + 30}{y +1} = x - 5
$

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$

$y = \frac{x -35}{5}$

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3 years ago

BC is parallel to DE. What is the length of BC?A. 8B. 7C. 6D. 9​

BC is parallel to DE. What is the length of BC?A. 8B. 7C. 6D. 9