Kzamor
25.07.2019 •
Mathematics
Aline that is perpendicular to y=-2/7x+9y and that passes through the point (4, -6)
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Ответ:
y = -2/7x + 9
Slope = -2/7
Perpendicular slope= 7/2
Find y - intercept :
y = mx + b
y = 7/2 x + b
At (4, -6)
-6 = 7/2 (4) + b
-6 = 14 + b
b = -6 - 14
b = -20
Form equation :
y = mx + b
y = 7/2 x - 20
2y = 7x - 40
2y = 7x - 40
Ответ:
5 = 2x + 3x + 9
Next step, add -9 ANSWER
5 + (-9) = 5x
-4 = 5x
x = 5/-4
x = -1 1/4