Question 416409
Solve y=-x+8 
and x+y=7
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Slope forms:
y = -x+8
y = -x+7
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The slopes are the same and intercepts
are different so the lines are parallel.
Ans: A
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Cheers,
Stan H.
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A) This system has no solutions. 
B) This system has infinitely many solutions
C) (1/2, 15/2)
D) (-1/2, 17/2)