3^5
3 x 3 x 3
3:5 <- I think
The rule for quotients of similar bases with different exponents is:
(a^c)/(a^b)=a^(c-b) in this case:
15^18/(15^3)=15^15
Answer:
No solution
Step-by-step explanation:

Lets consider the equation 2.
Here we multiply the LHS and RHS with (-1).

Hence,

When we add the equations we get,

As 0 doesn't equal to -1, answer is d) No solution
Well the best answer for LCD is

is 5(x+3y) and the best answer for LCD is

is 2(x+3y)
I hope this helps!