Answer:
5/9
Step-by-step explanation:
a
b
÷
c
d
=
ad
bc
1
3
÷
3
5
=
(1)(5)
(3)(3)
=
5
9
=
5
9
Answer:
41.68 or 42 (rounded)
Step-by-step explanation:
Presuming you are working on right triangles, you can use the Soh Cah Toa theorems.
Because angle A = 21 and side a = 16 you can use Toa or 

Plugged into a calculator, you get 41.68 and some change.
If this is NOT a right triangle question, please let me know so that I can revise my answer.
It is X=2 you have to see where it touched line