Answer:
x/6
Step-by-step explanation:
Use x to represent "a number" bc u dont know exactly what that number is.
Let
x---------> the thickness of the frame in feet
At-------> Area of the mirror and the frame in square feet
we know that
------> equation 
--------> equation 
equate equation
and equation 

therefore
the answer is the option

2500 is 40% of the 100%
so, from the 40%, figure out 10%
2500/4=600
600 x 6=3,600
so, 3,600 is the answer
Answer:
It would be a straight line.
Step-by-step explanation:
It would be a negative, linear line. It would be steep.