Answer 10 because 110 minus 100 is ten
to make a perpendicular function from another we must take its slope and make two transformations
the slope of y=1/3x is 1/3
the transformations:
1.
reverse the number

2.
and change the sign

ok we have the slope now need the general equation of the line

where m is the slope , b a cut point and (x,y) a point
so, we have the slope=-3 , and the point (2,-3) we can replace to find b

now we can replace b and the slope to have the final equation
Since the perimeter of said hexagon is 120√3, we simply multiply this number by 10 and divide it by 2.
1200√3/2 = 600√3
The identity property. the same applies for n*1=n.
I would say A. 2 1/2
5 1/2 - (4/9 * 7) = 2 7/18 (2.38888 rounded to 2.4 which is about 2 1/2) Hope this helps. Good Luck!