Question 243469
which system has no solution? 
(a) lines 1 and 2 
(b) lines 1 and 3 
(c) lines 1 and 4 
(d) lines 2 and 3.
Ans: d
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which system has infinite solution? 
(a) lines 1 and 2 
(b) lines 1 and 3 
(c) lines 1 and 4 
(d) lines 2 and 4.
Ans: c
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which system has exactly one solution? 
(a) lines 1 and 2 
(b) lines 1 and 3 
(c) line 2 and 4 
(d) all of these
Ans: d
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here are the equations 
x+y=4
slope = -1;intercept = 4
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2x-3y=-9 
slope = 2/3 ; intercept = 3
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y=2/3x
slope = 2/3 ; intercept = 0
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y=-x+4
slope = -1 ; intercept = 4
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Cheers,
Stan H.