Answer:
55°
Step-by-step explanation:

I think maybe 0.3 then 2 1/2 and then 15
Answer:
3Y - 4X - 4
Step-by-step explanation:
1/3n = 4....multiply both sides by 3/1 or just 3, the reciprocal of 1/3
(3/1)(1/3)n = 4 * 3/1
n = 12
The factors of 15 are 1, 3, 5 and 15. Now, as 1 is neither prime and nor a composite number (1 is not Prime because for a number to be a prime, it should have exact 2 factors i.e. 1 and itself, but 1 has only one factor. Therefore 1 is not prime.)
So the smallest prime factor of 15 is 3.
Hope this helped! :)