1/9 times 3/1 = 1/3. Now divide 1/3 by 5 or multiply by 1/5 and you get 1/15. There's your answer
Answer:
in my class just say the (x) mean number 1
The answer is D) They do not intersect and are not coplanar.
Hope this helps ;)
The simplest example would be 4. 4 is divisible by 4, but not by 8, since

, but

. (The quotient needs to be an integer)