Help with math problem

Mathematics
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If the line passing through the points (2, a) and (5, - 3) is parallel to the line passing through the points (4, 8) and (- 5, a + 1) , what is the value of a?
A.
B.
C.
D.
Nov 3rd, 2015

Thank you for the opportunity to help you with your question!

b. -4.....

BUT GIVE A SECOND I CONFIRM!

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Nov 3rd, 2015

sORRY BUT 

Answer=     A=-8!...

Nov 3rd, 2015

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