5. In the figure, BE||CD. Solve for x. Show your work.

Answer:
x = 15
Step-by-step explanation:
There are theorems regarding Property of Similar polygons.
Corresponding sides are in proportion.
triangle ABE is similar to triangle ACD
so
AB:BC = AE: ED
x:10 = 9:6
(x/10) = (9/6)
x = 10*9/6 = 5*3 = 15