kx+y=1 x+ky=2

solve for k

the answer is one of the following choices:

A) K=1
B) K=-1
C) K=1 and K= -1

D) K is not equal to 1, -1
in Algebra 2 Answers by

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1 Answer

k cannot be 1 or -1 because these values would create inconsistency: 1=x+y=2, -1=x-y=2. Therefore D is the answer.

by Top Rated User (1.2m points)

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