9/8
Explanation: a perpendicular slope is the opposite of what the normal slope was before
X=12.5
If the perimeter is 90
90=3x+3x+15
Combine like terms
90=6x+15
Subtracts 15 from both sides
75=6x
Divide by six to get x by itself
12.5=x
Does this help?
It is 2/10 for tour question
