If x to the tenth power = 5555, and x to the ninth power / y = 5, what is the value of xy?

Answer 1

x^10 = 5555

x^9
----- = 5
y

Multiply top and bottom by x:
x^10
------- = 5
..xy

Substitute in for x^10:
5555
------- = 5
..xy

Multiply both sides by xy:
5555 = 5 xy

Divide both sides by 5:
xy = 5555 / 5

Answer:
xy =1111