IN MATH: 1. adj. curves which share all their points; curves which appear to lie on top of each other. EX. The lines y = 3x + 4 and 2y = 6x + 8 are coincident.

IN ENGLISH: 1. adj. coinciding in space or time. 2. adj. identical. 3. as defined above.

APPLICATION: See list 310.

1. Check which pair(s) of lines or planes are coincident.

a)
3x - 2y = 9
3x + 2y = 9
b)
x - y - z = 2
4x - 4y -4z = 8
c)
4x + 5y = 0
-4x - 5y = 0
d)
y = mx + b
ay = amx + ab

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