# Algebra II

posted by
**Lucy**
.

Solve, round to four decimal places if necessary:

log4(x-9)=2

Answer:

x-9=4^2

x-9=16

x=11

log4(z)+log4(z-3)=1

Answer:

z+z-3=1

2z=4

z=2

Thanks for checking my work.

posted by
**Lucy**
.

Solve, round to four decimal places if necessary:

log4(x-9)=2

Answer:

x-9=4^2

x-9=16

x=11

log4(z)+log4(z-3)=1

Answer:

z+z-3=1

2z=4

z=2

Thanks for checking my work.