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13.01.2020 •
Mathematics
Find the perpendicular slope of the line 3x-9y=15
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Ответ:
-9y = -3x + 15
y = (-3/-9)x + (-15/9)
y = 1/3x - 5/3slope here is 1/3. A perpendicular line will have a negative reciprocal slope.All that means is " flip " the slope and change the sign.
So our perpendicular slope will be : -3 ( I flipped 1/3 and it became 3/1 or just 3...I then changed the sign and it became -3)
so the perpendicular slope is -3
Ответ: