Answer:
1,590.4 pretty sure that's it
Answer:
D
Step-by-step explanation:
This is the only answer where the x isn't a whole number.
A: x= 3
B: x= 5
C: x= 6
D: x= 2.8284...etc
The change of base formula allows you to write a logarithm in terms of logarithms with another base. It follows this pattern,

where a≠1 and b≠1
Assigning the base to be 7,

I hope I was able to answer your question. Have a good day.
X could either be 4 or 5, depending on which x the question asks. If you have to chose one answer go with 5 because it's associated with the y.