Subtracting -9 from any number is the same as
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<u>subtracting 9 from that number.</u>
Answer:

Step-by-step explanation:
Equation of a line:
The equation of a line has the following format:

In which m is the slope and b is the y-intercept.
Perpendicular lines:
When two lines are perpendicular, the multiplication of their slopes is -1.
Perpendicular to y=1/8x+2
This line has slope 
So, for the line we want to find the equation, we have that:


So

Find the equation of the line through point (1,−5)
This means that when
. We use this to find b. So:



The equation of the line is:

1199.3 (I'm assuming you mean round to the nearest tenth)
I’m pretty sure it’s 9/10 - 2/5. I’m sorry If it’s wrong