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What is b for these two perpindicular equations 3x plus y-8 equals 0 and -2x plus by plus 9 equals 0?
Wiki User
∙ 13y ago
3x + y - 8 = 0
-2x + by + 9 = 0
y = -3x + 8
by = 2x - 9
y = -3x + 8
y = (2/b)x - 9/b
Since the lines, represented by these equations, are perpendicular, their slopes are negative reciprocal of each other. So that 2/b must be equal to 1/3.
2/b = 1/3
b = 6
Wiki User
∙ 13y ago
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