With the help of the forum, I've gone through many more exponent exercises. But I have one more questions.
Problem with this one is that I do not know the answer, but I assume that the answer much be a simple whole number - all the other answers for this section are - but my solution doesn't seem to be right.
Problem
2^(x)+8*2^(-x)=9
I started out by multiplying both sides by 2^(x)... and simplified. I ended up with 20^x=18^x
any thoughts?!?
Hello, conpark!
Problem with this one is that I do not know the answer. **
. .
Multiply by
Factor: .
Solve the resulting two equations:
. .
. .
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** It's difficult to solve a problem when we don't know the answer.
At the start of a trip, my odometer read 23,400 miles.
At the end of the trip, it read 23,700 miles.
I'd like to know how far I drove . . . but I don't know the answer.