C
Like two walls they touch the whole line
F(x)= -4x+9
Multiply f*x
xF=9+4x
Solve for X: -4x+xF=9+4x-4x=0
Combine like terms: -4x+4x=0
-4x+xF=9+0= 9
-9+-4x +xF = 0.
It can be found by using the formula,
an = a+(n-1)d
From cm to km you divide the number by 100000
So 35,000/100000 = 0.35km
