I need help with a math problem

Mathematics
Tutor: None Selected Time limit: 1 Day

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.
Dec 1st, 2015

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

(a+3)/(-3) = (7-a)/9

9a+27=3a-21

6a = -48

a = -8 

Please let me know if you need any clarification. I'm always happy to answer your questions.
Dec 1st, 2015

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