SOLUTION: Determine whether the lines are parallel, perpendicular, or neither. y = 5( 4x + 9) and y = - 1/20x

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Question 432324: Determine whether the lines are parallel, perpendicular, or neither.

y = 5( 4x + 9) and y = - 1/20x - 4

A)

Parallel

B)

Perpendicular

C)

Neither

Found 2 solutions by stanbon, richard1234:
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
Determine whether the lines are parallel, perpendicular, or neither.
y = 5( 4x + 9) and y = - 1/20x - 4
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y = 20x+45
slope = 20
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y = (-1/20)x -4
slope = -1/20
-----
Since the product of the slopes is -1
the lines are parallel.
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Cheers,
Stan H.

Answer by richard1234(7193) (Show Source):
You can put this solution on YOUR website!
I'm sure Stan meant to say "perpendicular." If two lines have slopes that multiply to -1, the lines are perpendicular.

SOLUTION: Determine whether the lines are parallel, perpendicular, or neither. y = 5( 4x + 9) and y = - 1/20x - 4 A) Parallel B) Perpendicular C) Neith