Questions on Algebra: Logarithm answered by real tutors!

Tutors Answer Your Questions about logarithm (FREE)

Question 615132: Please Help Me Condense this expression log5 10+log5 2-log5 4
Show Work
Click here to see answer by lwsshak3(6512)

Question 615329: log4(64/y)=?
4 to what power = 64/y
How do I go about solving this?
Click here to see answer by jsmallt9(3296)

Question 615297: 2 divided by log8a-4 divided by log2a=1 divided by log4a
Click here to see answer by jsmallt9(3296)

Question 615386: How do you express something as a single logarithm?
And how would you express and answer without a logarithm?
Thank you!
Click here to see answer by josmiceli(9686)

Question 615443: Solve 2^logx 8 = 32 by giving your answer correct to 4 significant figures.
i've tried to solve it.
my answer :
2^logx 8 = 2^5
logx 8 =5
8=x^5
...??
:(
Click here to see answer by stanbon(57361)

Question 615686: solve log(x+20)-log(x+2)=logx
Click here to see answer by math33(31)

Question 615686: solve log(x+20)-log(x+2)=logx
Click here to see answer by MathTherapy(1425)

Question 615879: Solve 4^2t = 5^4t+4]
I get -2.5803 but i think I did something wrong.
Click here to see answer by stanbon(57361)

Question 615879: Solve 4^2t = 5^4t+4]
I get -2.5803 but i think I did something wrong.
Click here to see answer by solver91311(16897)

Question 615923: find the solutions of the exponential equations
so the problem is 7^x/2=5^1-x
so far i have came up to here...
x/2 log 7=(1-x) log 5
now what?
Click here to see answer by jsmallt9(3296)

Question 616022: Need help solving equations such as:
log 11 (3x+10)= log 11 (x+6)
Click here to see answer by jsmallt9(3296)

Question 616065: Find the value of log base 4 of 4096.
I tried simplifying it to 4096=4^x and then I divided by 4 and I got 1024. The is answer is 6 but I do not know how to get there. Please help :)
Click here to see answer by dragonwalker(72)

Question 616053: Can you please help me solve and simplify?
In(x)+In(2x+5)=In7

Click here to see answer by math33(31)

Question 616056: Can you please help me solve and simplify?
log(x²-4)-log(x+2)=log(3-x)
Click here to see answer by nerdybill(6962)

Question 616058: Can you please help me solve and simplify?
3log of 27(x-1)=2
Click here to see answer by lwsshak3(6512)

Question 614264: 1.) e^x=148.413
2.) 25=e^3x
3.) 9e^5x=5
4.) 1/4e^x=30

Click here to see answer by lwsshak3(6512)

Question 612244: Log base 3(x-4)=2
Click here to see answer by lwsshak3(6512)

Question 612238: 5^4x+3=29
Click here to see answer by lwsshak3(6512)

Question 611444: Solve the equation:
ln x + ln 2x=2.4
Click here to see answer by lwsshak3(6512)

Question 607923: logx^e^5 = 5
Click here to see answer by lwsshak3(6512)

Question 616162: solve log5x + log14 = 1
Click here to see answer by stanbon(57361)

Question 616145: Simplify the expression below and write it as a single logarithim
3log(x+4)-2log(x-7)+5log(x-2)-log(x^2)
Click here to see answer by lwsshak3(6512)

Question 616257: How do I condense the following expression: 4(log12-log3)-5(log16-log4)
Click here to see answer by lwsshak3(6512)

Question 616332: It would be very appreciated if somebody could solve these for me.. sorry for the bad formatting, I'm not used to typing equations. :P
1. 1/4log(2)16 + 1/2log(2)49 = log(2)x
2. 4^(3x) = 10
3. log(3)0.1 + 2log(3)x = log(3)2 + log(3)5

Click here to see answer by Alan3354(30993)

Question 616355: Please help me with this word problem: The probability of a transistor failing within t months is given by P(t)=1-e^-0.016t. use logarithms to determine within how many months the probability of failure will be 99.9% Round 2 decimal places.
Click here to see answer by jsmallt9(3296)

Question 616462: Please help me with this word problem: A person buys a cup of coffee and drinks it in the store. The coffee's temperature y(in degrees Fahrenheit) is given by y=70+137e^kt, where t is the number of minutes since he bought the coffee. A.) Use the equation to determine the temperature of the coffee when the person bought it. B.) If the person begins drinking the coffee when it reaches 180'f, use logarithms to find out how much time must he wait after buying it (start drinking it.)
Click here to see answer by nerdybill(6962)

Question 616467: Can you please help me solve this?: The compound interest formula is given by A=P(1+r/n)^nt, where A is the amount after t years generated from an initial, principal investment P, compounded n times annually at an interest rate r. Use logarithms to solve for t.
Click here to see answer by MathTherapy(1425)

Question 616468: solve and simplify. 3log of 27(x-1)=2

Click here to see answer by lwsshak3(6512)

Question 616544: what is the correctly expanded form of
log 6 11c^-9/d√3(6-)
Click here to see answer by lynnlo(4164)

Question 616652: I need help solving logbase18(-3x+1)=logbase18(5x+9).
Click here to see answer by lwsshak3(6512)

Question 616744: How do I solve this? Thank you!!
log[2](2x+15)-log[2](x)=3
Click here to see answer by nerdybill(6962)

Question 616752: Logx49=2 in exponential form...the x is suppose to be small
Solve for the unknown variable: Log3X=5...the 3 is suppose to be small
Click here to see answer by scott8148(6628)

Question 616750: condense the expression
3 logx +logy- logz
Click here to see answer by Alan3354(30993)

Question 616809: Need help solving for x:
2^(3x-2) = 3^(2x+1)
Click here to see answer by stanbon(57361)

Question 616866: Please help solve and simplify: 3log of 27(x-1)=2
Click here to see answer by ewatrrr(10682)

Question 616875: 3log27(x-1)=2 solve and simplify and graph
Click here to see answer by ewatrrr(10682)

Question 616868: Please help me with this word problem: The probability of a transistor failing within t months is given by P(t)=1-e^-0.016t. Use logarithms to determine within how many months the probability of failure will be 99.99% Round to two decimal places.
Click here to see answer by ewatrrr(10682)

Question 616863: Please help me solve, simplify &graph: log(x+2)=5-x
Click here to see answer by josmiceli(9686)

Question 617033: Express the following in terms of x without natural logs.
a) ln(1/e^8x)
b) ln(√ex)
Click here to see answer by lwsshak3(6512)

Question 617076: If log (x) = 2.07 so what does x equal?
Click here to see answer by josmiceli(9686)

Question 617078: Please help me
Solve for all values of x, to the nearest 10th.
log4(2x−7)+log4(3x−3)=4
Click here to see answer by ewatrrr(10682)

Question 617078: Please help me
Solve for all values of x, to the nearest 10th.
log4(2x−7)+log4(3x−3)=4
Click here to see answer by jsmallt9(3296)

Question 617078: Please help me
Solve for all values of x, to the nearest 10th.
log4(2x−7)+log4(3x−3)=4
Click here to see answer by josmiceli(9686)

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