A and b are positive integers and a-b=3. Evaluate the following: 9^1/2b/3^a

Ineed to know the answer to this algebra question.

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be