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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