Logarithm properties:

According to this, we can get:
NPER function
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Answer:
integer
Step-by-step explanation:
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Answer: 54 mph
Step-by-step explanation:
d-the distance
s+9 - the speed to the conference
d=6*(s+9)
s- is the speed on the way back home
d=7*s
so 6*(s+9)=7*s
6s+54=7s
-6s -6s
54= 7s-6s
s=54 mph
Answer: 27x-3 :)
Step-by-step explanation: