Multplication is used: you multiply 675 by 28 to get the answer.
When you divide two powers of the same base, you subtract the exponents:

This means that, in your case,

So, if
, the equation becomes

Answer:
-3/4 slope
Step-by-step explanation:
y = 3/4 x +2 has a slope of 3/4
Perpendicular lines intersect.
So the slope of the perpendicular line must be opposite.
Our goal is to get y by itself
We will first add 3x to both sides to get
-5y = 3x - 15
We will then divide both sides by -5 to get y by itself which becomes
y = -3/5x + 3