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Algebra 13 Online
OpenStudy (anonymous):

evaluate 16=2^(x-1)

OpenStudy (anonymous):

and please show work!

OpenStudy (phi):

one way to do this is first change 16 to 2 to some power. can you do that?

OpenStudy (phi):

the first thing to do here is change 16 to 2 to some power how many times do you multiply 2 times itself to get 16?

OpenStudy (anonymous):

4?

OpenStudy (phi):

2*2*2*2= (2*2) * (2*2) = 4*4= 16 yes 2^4 =16 use this fact in your problem

OpenStudy (anonymous):

im confused

OpenStudy (phi):

16=2^(x-1) replace 16 with 2^4 2^4 = 2^(x-1)

OpenStudy (anonymous):

ok now what

OpenStudy (phi):

If it is not clear, 2^4= 2^(x-1) that means 4= x-1

OpenStudy (anonymous):

4=x-1 +1 +1 x=5?

OpenStudy (phi):

try x-5 in your problem 2^(x-1) = what when x=5

OpenStudy (phi):

*try x=5 in your problem

OpenStudy (anonymous):

16=16 got it thanks!

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