Questions on Algebra: Logarithm answered by real tutors!

Tutors Answer Your Questions about logarithm (FREE)

Question 322631: Evaluate the expression
log4 + log25
Click here to see answer by stanbon(57347)

Question 322992: Please help me solve this equation: A=(1+D)^365-1
Click here to see answer by solver91311(16885)

Question 323018: 3^(x+3)+3^x=84 (hint 3^x+3=3^x3^3) please help... Solve the equation
Click here to see answer by Fombitz(13828)

Question 323018: 3^(x+3)+3^x=84 (hint 3^x+3=3^x3^3) please help... Solve the equation
Click here to see answer by jessica43(140)

Question 323102: How would I do this problem?
2log2(x)+log2(3)=log2(27)
Click here to see answer by josmiceli(9678)

Question 323113: log 0.01(100)^3=x
Click here to see answer by nerdybill(6958)

Question 323106: Not sure if I did this right. Any help appreciated.
log(x)+log(5)=2

Click here to see answer by nerdybill(6958)

Question 323190: I need help doing this problem. Thank you
6^2t=7200
Click here to see answer by ankor@dixie-net.com(15652)

Question 323234: I need to solve for X:
log5(2x+1)=2
Click here to see answer by nerdybill(6958)

Question 323458: What is:
log(5-3x)+log(5+3x)=log(16x squared)?
Click here to see answer by Alan3354(30993)

Question 323586:
Determine the value of 'a'
Thanks
Click here to see answer by jim_thompson5910(28595)

Question 323658: Find the domain of the function .
please help and hope that I typed in correct form.
Click here to see answer by solver91311(16885)

Question 323720: The perimeter of a rectangle is 26 m. The length is 7 m more than twice the width. Find the dimensions

Please help
Click here to see answer by unlockmath(1599)

Question 323734: Logx16=2
Click here to see answer by Earlsdon(6287)

Question 323734: Logx16=2
Click here to see answer by Fombitz(13828)

Question 323740: Log8 x=1/3
Click here to see answer by Fombitz(13828)

Question 323741: Logs x=1/3
Click here to see answer by Fombitz(13828)

Question 323780: Log2 x=-1
Click here to see answer by jim_thompson5910(28595)

Question 323781: Log9 x=1/2
Click here to see answer by stanbon(57347)

Question 323828: Write as a single log: -2log3 - 3log2 + log6
Click here to see answer by rapaljer(4667)

Question 323946: Solve for x: log(x-3) - log(x-2) = log(x+1)
Click here to see answer by Fombitz(13828)

Question 323943: Solve for: 25(2x-1)= 5(5+1)
Click here to see answer by Fombitz(13828)

Question 323962: 2log2(5-x)=3
Click here to see answer by Fombitz(13828)

Question 323977: Convert from log form to exponential form or vice versa.
x7=25
Click here to see answer by Alan3354(30993)

Question 323987: Solve: log 3 (-2x) = log 3 14
Click here to see answer by Fombitz(13828)

Question 323979: Solve:
27x + 2 = 81-2 + x

Click here to see answer by mananth(12270)

Question 323979: Solve:
27x + 2 = 81-2 + x

Click here to see answer by Fombitz(13828)

Question 324120: Write as a single log: 1/2logx^2-2log(x+1)+log5
Click here to see answer by stanbon(57347)

Question 324033: Write as a single log: 1/2logx^2 - 2log(x+1) + log5
Click here to see answer by Fombitz(13828)

Question 324247: Solve for x:
log66^2

the first 6 is the base
Click here to see answer by Alan3354(30993)

Question 324303: I need help solving this.
log(x+2)=1-log(x-1)
Click here to see answer by Fombitz(13828)

Question 324458: Solve for: 25^(2x-1) = 5^(5x+1)
Click here to see answer by nyc_function(2733)

Question 324487: log2^x + log 2^5 = 6
the 2 is a subscript of the log (located at the bottom right corner). I remember that since the first two are added that the two must be multiplied together so I think it should read log2^5x = 6 but I'm not sure and am now stuck as to what to do.
Click here to see answer by scott8148(6628)

Question 324536: How do you solve log25(x-1)+log25(x+3)=1/2
Click here to see answer by solver91311(16885)

Question 324535: How do you solve 2log5(x)=log5(5x-6)
Click here to see answer by scott8148(6628)

Question 324533: How would you solve:
log3(5x-1)-log3(x+3)=log3(4)
Click here to see answer by Fombitz(13828)

Question 324576: Write 3 ln(x-4)-5 ln(x-5)ln(x^2-7) as a single logarithm with a coefficient of 1. Directions---assume all variable expressions represent positive real numbers.
Click here to see answer by stanbon(57347)

Question 324585: evaluate the expression without using a calculator.
e^1n^296
Click here to see answer by Fombitz(13828)

Question 324577: Help! I need to do the following:
Expand the logarithmic expression in(z^4/3). assume all variable expressions represent positive real numbers.
Click here to see answer by Fombitz(13828)

Question 324566: Hi, I'm trying to study a study guide that my teacher gave me but I just don't understand how he got the answer. The problem is
A fossilized leaf contains 28% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as the half-life of carbon 14.
What is the formula?
Click here to see answer by Fombitz(13828)

Question 324723: log5x = 2-logx5
Click here to see answer by solver91311(16885)

Question 324770: how do you work 4logX= 2logX+3
Click here to see answer by Fombitz(13828)

Question 324795: Use the properties of logarithms to expand the expression as a sum, difference, and/or constant multiple of logarithms. (Assume all variables are positive.)
ln[sqrt((x^7)(x+2))]

i got lnx^(7/2)+(1/2)ln(x+4)....but apparently it was wrong
Click here to see answer by 1satanist(2)

Question 324769: how do i write a logorithum for this equation:
The number of students with cell phones in the city of Oakridge was 100 in the year 2000. The number of cell phones increased 224% annually.
What exponential function describes the number, y, of cell phones owned by high school students x years after 2000?What is the equivalent logarithmic function? What do the independent and dependent variables for this function represent? Show how you developed the function.
here is what i came up with but i don't know if it is right....
y=100*2.24^x
y=log(100)+(log(x)/log(2.24))
Click here to see answer by scott8148(6628)

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