Question

If the lines y = 3x − 2, y = nx + 11, and y = −px + 1 are parallel, then what is p + n?
Answer
5
0
-3
-2

Answer 1

If the lines are parallel, all the slopes of the lines are equal to each other, thus
3 = n = −p
n= 3, p = -3.
n+p = 3-3 = 0.
Answer: 0