SOLUTION: The line passing through the points (a+3, 5) and (1,a-2) has slope m=4. Find the value of a.

Algebra ->  Trigonometry-basics -> SOLUTION: The line passing through the points (a+3, 5) and (1,a-2) has slope m=4. Find the value of a.       Log On


   

Question 1170738: The line passing through the points (a+3, 5) and (1,a-2) has slope m=4. Find the value of a.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
slope is a-2-5 divided by 1-a-3
this is (a-7)/(-a-2)=4
so -4a-8=a-7
-5a=1
a=-0.2
the points (2.8, 5) and (1, -2.2) have slope -7.2/-1.8 or 4
The answer is -0.2