These questions are based on Similar Triangles
We have that ΔADE ~ ΔABC
AB = AE + BE = 11+ 10 = 21
So
AD / AE = AB / AC
AD / 11 = 21 / 35 multiply both sides by 11
AD = 11 * (21 / 35 )
AD = 11 * ( 3 / 5)
AD = 33 / 5
Thank you once again CPhill
