Can someone
consider the line 7x+5y=9
what is the slope of a line perpendicular to this line?
what is the slope of a line parallel to this line?

5/7 and -7/5

Step-by-step explanation:

slope is - 7/5

if line is written as Ax + By + C = 0

the slope is -A/B

if you work that equation you have

By = - Ax - C

y = (-A/B) × x - C/B

and term multiplying the x is the slope in case you had doubts about the - A/B

the multiplication of the slopes of 2 lines that are perpendicular is - 1

x × -7/5 = -1

x = 5/7

the slope of 2 lines that are parallels is the same, so slope = -7/5

6 cars because if you have 8 and subtract 2 youll have 6 left over