Login or Sign Up

Ask a New Question

solve 4^(3-x)=7 to 3 s.f. showing all workings.

I have got as far as -x =log(7)-3log4/log(4)

take log of both sides

log(4^(3-x)) = log 7
(3-x)log4 = log7
3-x = log7/log4
-x = -3 + log7/log4
x = 3 - log7/log4
= appr. 1.5963

Similar Questions

Logarithm!!!Select all of the following that are true statements: (a) log(2x) = log(2) + log(x) (b) log(3x) = 3 log(x) (c)

Top answer: 2 log 10 power 5 +log 10 power 8-1/2 log 10 power 4 answer Read more.
solve for x: 3^2x+3=7^x+1I did 2x+3=log0f3(7)+ logof3(7) (2-log of 3(7))x=log of 3(7)-3 x=log of 3 (7)+log of 3 (3^-3)/log 0f 3

Top answer: I assume you meant 3^(2x+3) = 7^(x+1) Since the bases are in no way related, just take logs, in Read more.
Prove that log a, log ar, log ar^2 is an a.p.Is the following below correct? Log ar^2 - Log ar= Log ar - Log a hence applying

Top answer: log a, log ar, log ar2, ...log a (r)^n now, log ar^n=log a + n log r consider the next term log Read more.
What am I doing wrong? I keep getting 48 and its wrong...Solve 2log(x)-log(4)=3log(4) 2log(x)-log(4) log(x/4)=3log4

Top answer: 2log(x)-log(4)=3log(4) log x^2 - log 4 = log 4^3 log (x^2/4) = log 64 x^2/4 = 64 x^2 = 256 x = 16 Read more.
h(x) = log (6x+5/7x-4)Find a formula for the inverse function h^-1(x) h^-1(x) = My work so far h(x) = log(6x+5/7x-4)

Top answer: First, you have to note that since log(z) is defined only for z>0, we must have x < -4/5 or x > 4/7 Read more.
write as a single logarithm:-2logbase3(1/x)+(1/3)logbase3(square root of x) please show the steps to solving this. thanx.

Top answer: To write the expression -2log₃(1/x) + (1/3)log₃(√x) as a single logarithm, we can apply the Read more.
How do you solve a system of logarithmic equations? They have completely different bases:{(log(25)^3)x + (log(2)^7)y = log(5)^27

Top answer: recall that log_a(b) = ln(a)/ln(b) So, converting everything to natural logs (or any set of logs Read more.
i have problem i can't solve and the book is no help.. anyone got osme hints or somehting i could start off doing?the problem

Top answer: To solve the equation sin(27 degrees) = x / 8, you can use the following steps: Step 1: Convert 27 Read more.
Write the expression as a single logarithm.4 log x – 6 log (x + 2) (1 point) Responses 24 logx over x plus 2 24 log Image with

Top answer: 24 log(x/(x + 2)) Read more.
write as a single logarithm:ln(x/x-1)+ ln(x+1/x)- ln(x^2-1) please show me the steps. thanx Michelle, I hope you know the three

Top answer: You're welcome! I'm glad I could help you figure out what you were doing wrong. Remember to always Read more.