Let P and Q be constants. The graphs of the lines x + 5y = 7 and 18x + Py = Q are perpendicular and intersect at the point (-3,2). Enter the ordered pair (P,Q).
+36916 * ** edited ** *
18(-3) + p(2) = q
slope of first line is -1/5 to be perpindicular second line must be 5
soo y = -18/p x +q/p - 18/p = 5
-18/ 5 = p = -3.6
Then using red equation -54 + 2(-3.6) = q = -61.2
x + 5y =7
18x -3.6y = -61.2
Here is a graph:
https://www.desmos.com/calculator/ln3owxicev
