Question

find the value of a. ​

Answer 1

Answer:

7

Step-by-step explanation:

if the points are collinear then their slopes must be equal

slope=(y2- y1)/(x2- x1 )

(6-2)/(-5-1)=(-2-6)/(a+5)

4/(-6)=(-8)/(a+5)

-2/3=(-8)/(a+5)

a+5=(-8)/(-2/3)

a+5=12

a=12-5

a=7