SOLUTION: find the missing coordinate of m=-4/5 and the given points are (5,9) and (x,13).

Algebra ->  Points-lines-and-rays -> SOLUTION: find the missing coordinate of m=-4/5 and the given points are (5,9) and (x,13).      Log On


   

Question 923580: find the missing coordinate of m=-4/5 and the given points are (5,9) and (x,13).
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Do it like this one.
===============
(2, -8) and (x, 2); slope: -10/3
----
Slope m = diffy/diffx
m = (-8-2)/(2 - x) = -10/3
-10/(2-x) = -10/3
-30 = -10(2-x) = -20 + 10x
10x = -10
x = -1