brianluong00 brianluong00

10-09-2017
Mathematics

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The equation of line n is 8x - 14y + 3 = 0.
What is k if the graphs of n and kx - 7y + 10 = 0 are perpendicular?

Respuesta :

10-09-2017

For perpendicular lines:
"Their slopes' product is -1"

As these lines should be parallel, so their slopes would be the same.

Slope of line n:
8/14 = 4/7

Slope of the other line:
k/7

Equating them:
4/7 * k/7 = -1
4k / 49 = -1

4k = -49

k = - 49/4 = -12.25

This means k= - 12.25

Sorry for confusion

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