Its kind of like how it is on a car to tell how fast your going i hoped this helped!
Given:
The equation of given line is

A line is perpendicular to the given line and passes through the point (9,5).
To find:
The equation of the perpendicular line.
Solution:
We have,

On comparing this equation with slope intercept form
, we get

It means, the slope of the given line is 3.
The product of slopes of two perpendicular lines is -1.



Point slope form of a line is

Where, m is the slope.
The slope of perpendicular line is
and it passes through the point (9,5). So the equation of the line is



Adding 5 on both sides, we get


Therefore, the equation of required line is
.
1) 185.16 - 18.99 = 166.17
2) divide 166.17 by 0.87 = 191
3) he drove the truck for 191 miles
45cm I’m sorry that’s not the answer I just need answers for my questions sis