Let line 1 be the graph of 5x+8y=-9. Line 2 is perpendicular to line 1 and passes through the point (10,-10). If line 2 is the graph of the equation y=mx+b, then find m+b.
+36916 5x+8y=-9.
y = -5/8 x - 9/8 slope = -5/8 perpindicular = 8/5
y = 8/5 x + b sub in given point
-10 = 8/5 (10) + b shows b = -26
y = 8/5 x -26
You can finish >...........
