# Questions on Algebra: Logarithm answered by real tutors!

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 Algebra: Logarithm Solvers Lessons Answers archive Quiz In Depth

 Question 104232: 2log( x ) = log(2) + log(5x-8) you can write x1= = = x2= = = SO THERE ARE TWO SOLUTION 8 AND 2 Click here to see answer by scott8148(6628)
 Question 104232: 2log( x ) = log(2) + log(5x-8) you can write x1= = = x2= = = SO THERE ARE TWO SOLUTION 8 AND 2 Click here to see answer by bimanewton(8)

 Question 104325: 17^x=0.5 Changed to x=log(17)0.5 x= 15.7144 (found in the back of text) having trouble entering into graph calculator Click here to see answer by scott8148(6628)

 Question 104689: Could someone please assist me by solving this logarithmic equation step-by-step for future reference. Thank you. log(7y + 1) = 2log(y+3)-log2 Click here to see answer by Fombitz(13828)

 Question 104685: Could someone please assist me by solving this logarithmic equation step-by-step for future reference. Thank you. log(7y + 1) = 2log(y+3)-log2 log(7y + 1) = log(y+3)^2-log2 log(7y + 1) = log(y+3)^2/2 you can write (7y + 1) = (y+3)^2/2 2(7y + 1) = y^2+6y+9 14y+2=y^2+6y+9 y^2-8y+7=0 y1=(8+rootsquare(36))/2 =(8+6)/2 =7 y2=(8-rootsquare(36))/2 =(8-6)/2 =1 so (y1,y2) are (7,1) Click here to see answer by scott8148(6628)
 Question 104685: Could someone please assist me by solving this logarithmic equation step-by-step for future reference. Thank you. log(7y + 1) = 2log(y+3)-log2 log(7y + 1) = log(y+3)^2-log2 log(7y + 1) = log(y+3)^2/2 you can write (7y + 1) = (y+3)^2/2 2(7y + 1) = y^2+6y+9 14y+2=y^2+6y+9 y^2-8y+7=0 y1=(8+rootsquare(36))/2 =(8+6)/2 =7 y2=(8-rootsquare(36))/2 =(8-6)/2 =1 so (y1,y2) are (7,1) Click here to see answer by bimanewton(8)

 Question 104905: Hi there, I'm completely stumped. I need to solve for X: (9^(2x))*(27^(x-3))=1/9 I graphed it, and know that the answer SHOULD be -11, but I need to see HOW to do the problem. Thank you, Brad Easler Click here to see answer by duggie(26)
 Question 104905: Hi there, I'm completely stumped. I need to solve for X: (9^(2x))*(27^(x-3))=1/9 I graphed it, and know that the answer SHOULD be -11, but I need to see HOW to do the problem. Thank you, Brad Easler Click here to see answer by HyperBrain(694)
 Question 104905: Hi there, I'm completely stumped. I need to solve for X: (9^(2x))*(27^(x-3))=1/9 I graphed it, and know that the answer SHOULD be -11, but I need to see HOW to do the problem. Thank you, Brad Easler Click here to see answer by Fombitz(13828)
 Question 104905: Hi there, I'm completely stumped. I need to solve for X: (9^(2x))*(27^(x-3))=1/9 I graphed it, and know that the answer SHOULD be -11, but I need to see HOW to do the problem. Thank you, Brad Easler Click here to see answer by bimanewton(8)

 Question 105107: Simplify, log a x^a - log b a^x + c, as a single logarithm. Click here to see answer by HyperBrain(694)

 Question 98545: I'm having trouble solving for 'x' in this equation . I have tried re-arranging it to make an exponential equation, but I end up confusing myself even more. Thank you for looking at this. Click here to see answer by bimanewton(8)

 Question 105522: How do I solve for x in the equation: (8)(56^2x)=10346 ??? Click here to see answer by HyperBrain(694)

 Question 105563: I am a Grandma in a jam! I am trying to help my grandson figure out a couple of Algebra questions and I need help!! Can someone please show me the logorithimic form of the equation: (1/3)^-4 = 81????? Help, Please. Thank YOu! Click here to see answer by ankor@dixie-net.com(15649)

 Question 105562: Can some one please help me help my grandson with this problem.?? Q: Assuming x is a positive #, useing the Logorithim properties to present the expression; log(x+4) - log x as the logorithim of a single quantity. Thank you very much. Click here to see answer by ankor@dixie-net.com(15649)

 Question 105570: I need someone's help. I need to find the value of x from logx169/121= 2?? Can someone please help me out on this?? Thank You! Click here to see answer by bucky(2189)
 Question 105570: I need someone's help. I need to find the value of x from logx169/121= 2?? Can someone please help me out on this?? Thank You! Click here to see answer by ankor@dixie-net.com(15649)

 Question 105564: I am a Grandma in a jam! I am trying to help my grandson figure out a couple of Algebra questions and I need help!! Can someone please show me the logorithimic form of the equation: (1/3)^-4 = 81????? Help, Please. Thank YOu! Click here to see answer by MathLover1(6628)

 Question 105800: express as a single logarithm: (a) 3log(x-2)+ 1/2 log(x) (b) log(3xy)- log(x) Click here to see answer by stanbon(57337)

 Question 105851: I'm guessing the answer is 4, but how do I solve this problem?? Solve the exponential function: Click here to see answer by scott8148(6628)

 Question 106297: 1. Solve the equation: logbase4(x-5) = 0.5 – logbase4(1-x). i follow through with the problem and get four different answers but none of them check out when they are plugged into "X". Click here to see answer by Fombitz(13828)

 Question 106341: I need help with this expression. logA/logB = A/B = 2/3. 2/3 is the correct answer, but the student who did this problem canceled the logs. What are A and B? Click here to see answer by scott8148(6628)

 Question 106365: log y = 1/4 log 16 + 1/3 log 64 All of the logs are a base 3 Please help I have worked every way I can and just can't seem to get the answer Click here to see answer by Nate(3500)

 Question 106373: Please help me with this expression: logA/logB = A/B = 2/3. The correct answer is 2/3. It was solved correctly to = 2/3. The logs were canceled which is not a proper method of using logs. I need to know what A and B are so that logA/logB = 2/3. I think the problem can be set up to look like: logA = log 2x and logB = log 3x. So, log2x/log3x = 2x/3x. Click here to see answer by stanbon(57337)

 Question 106845: Could you please take the time to help me solve this problem: Solve g(x) = 0 for x, if g(x) = log x + log x2 + 8 log x – log x3 – 16. Note that all logarithmic functions are to the base 10. Show your work. Thank you for helping me Click here to see answer by Fombitz(13828)

 Question 107367: simplify log 100x^3 + log 1000X^2 + log x/1000 Click here to see answer by josmiceli(9674)

 Question 107368: In 1990, the population of a twon was 32000 and was increasing at the rate of 3.2% per year Estimate the time for this town's population to double Click here to see answer by Annabelle1(69)

 Question 107587: Dear Tutor thank you for sloving this question in advance How do you slove this equation and find x 1+ 2lg(x+1)= lg(2x+1)+lg(5x+8) Click here to see answer by HyperBrain(694)

 Question 107651: how can we derive to this formula? log(-1).show all the works Click here to see answer by stanbon(57337)

 Question 107884: Thanks tutor for sloving this: lg(2x)-3lg2= lg means log with base 10 Click here to see answer by scott8148(6628)

 Question 107974: Hi, Please help me solve: S(t)=200[1-(0.86)^t] I've used the 10 hours for time to start S(10) and the result I have is S(10)=200[14]. I haven't found out what to do with the brackets or what they mean. I am also supposed to turn this into an exponetial and and logarithmic function for graphing. But I'm stuck at the start. I need this solved for an overdue assignment - Please help! Thanks, Marisa Click here to see answer by edjones(7569)

 Question 108092: in need of help with:solve algebraically ln 2+ ln(x-6)=ln(x+2) Click here to see answer by scott8148(6628)