3 years ago

Whether they are parallel, perpendicular or neither

Mathematics

1 answer:

galina1969 [7]3 years ago

8 0

Line 1 and 2 are parallel
line 1 and 3 are parallel
line 2 and 3 are parallel

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Order the numbers from least to greatest. 3 and thirty nine fortieths, 3 and nineteen twentieths, 3 and one half.

Assoli18 [71]

3 39/40 = 3.975
3 19/20 = 3.95
3 1/2 = 3.5

least to greatest : 3 1/2, 3 19/20, 3 39/40

8 0

3 years ago

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

Anastasy [175]

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
$

$y*x + 30 = (x -5)( y +1)$

$y*x + 30 = y*x + x - 5y -5$

$5y = x - 5 -30 = x - 35
$

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