# SOLUTION: #36. log5(8-3x)=3 #48. log2(2x)+log2(x+2)=log2 16 #49. ln e^x-2 ln e = ln e^4

Algebra ->  Algebra  -> Logarithm Solvers, Trainers and Word Problems -> SOLUTION: #36. log5(8-3x)=3 #48. log2(2x)+log2(x+2)=log2 16 #49. ln e^x-2 ln e = ln e^4      Log On

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 Question 135676This question is from textbook A Graphical Approach to COLLEGE ALGEBRA : #36. log5(8-3x)=3 #48. log2(2x)+log2(x+2)=log2 16 #49. ln e^x-2 ln e = ln e^4This question is from textbook A Graphical Approach to COLLEGE ALGEBRA Answer by stanbon(57361)   (Show Source): You can put this solution on YOUR website!#36. log5(8-3x)=3 8-3x = 5^3 3x = 8-125 x = -117/3 --------------------------------------- #48. log2(2x)+log2(x+2)=log2 16 log2[2x(x+2)] = log2 16 4x^2+4x = 16 x^2+x-4=0 x = [-1 +- sqrt(1-4*-4)]/2 x = [-1 +-sqrt(17)]/2 x = [-1+sqrt(17)]/2 or x = [-1-sqrt(17)]/2 --------------------------------------- #49. ln e^x - 2ln e = ln e^4 x-2 = 4 x = 6 --------------------------------------- Cheers, Stan H.