Depends on the angle of A and B
Your answer is (a) because 4 times 2 is 8 but since it's negative 2 it's negative 8
Answer:

Step-by-step explanation:
The equation of line in the form .
y = mx + c
Where m is the slope and c is the y- intercept .
As given
The lines y=3x-1 and y=ax+2 are perpendicular .
Here 3 is slope for equation of line y=3x-1 and a is slope for equation of line
y=ax+2 .
Now by using properties of the perpendicular lines property .
When two lines are perpendicular than slope of one line is negative reciprocal of the other line .
Thus

Therefore 
Answer:
A
Step-by-step explanation:
Photomath, lol
Answer:
5x-18=4x+7 ( vertical opposite angle)
5x-4x=7+18
x=25