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Log help? express log x in terms in log a, log b, log c.  TOPIC_SOLVED

Alright so here's the question:
Express log x in terms in log a, log b, and log c.
X=(ab)^3/c
(ab cubed All over c)

Not sure how to approach this. Do I make it log(ab)^3 or log(a)*log(b)^3 ?
by Hell0
on Sun Jun 23, 2013 5:08 am
 
Forum: Advanced Algebra ("pre-calculus")
Topic: Log help? express log x in terms in log a, log b, log c.
Replies: 4
Views: 2419

Re: Log help? express log x in terms in log a, log b, log c.  TOPIC_SOLVED

Yeah sorry that's what I meant. And yes X means x
by Hell0
on Sun Jun 23, 2013 4:44 pm
 
Forum: Advanced Algebra ("pre-calculus")
Topic: Log help? express log x in terms in log a, log b, log c.
Replies: 4
Views: 2419

Re: Log help? express log x in terms in log a, log b, log c.  TOPIC_SOLVED

Thanks . I totally misunderstood the question
by Hell0
on Wed Jun 26, 2013 12:36 am
 
Forum: Advanced Algebra ("pre-calculus")
Topic: Log help? express log x in terms in log a, log b, log c.
Replies: 4
Views: 2419

Which is the simplified version?

3(logA+logB)-logC
3logA+3logB-logC
by Hell0
on Wed Jun 26, 2013 12:38 am
 
Forum: Advanced Algebra ("pre-calculus")
Topic: Which is the simplified version?
Replies: 2
Views: 1023

Re: Which is the simplified version?

i just had to simplify it. and i would think the first one is simplified because the 3 is "gcf'd" out
by Hell0
on Wed Jun 26, 2013 5:34 am
 
Forum: Advanced Algebra ("pre-calculus")
Topic: Which is the simplified version?
Replies: 2
Views: 1023

Homework question  TOPIC_SOLVED

Hey i'd appreciate it if anyone could help me with this question.

If (x-2A)(2x+1)=2x2-Bx+10, then A • B =

thanks a lot
by Hell0
on Sun Sep 01, 2013 5:42 am
 
Forum: Advanced Algebra ("pre-calculus")
Topic: Homework question
Replies: 3
Views: 1245

Re: Homework question  TOPIC_SOLVED

Hi. this is what i tried


x - 4Ax = -Bx

and

-2A = 10

found a:

A = -5

then plugged it in:

x - 4(-5)x = -Bx
x + 20x = -Bx

pulled out the x because they all have it:

x + 20x = -Bx
1 + 20 = -B
-B = 21
B = -21

-21 * -5 = 105

The answer is 105?
by Hell0
on Sun Sep 01, 2013 4:41 pm
 
Forum: Advanced Algebra ("pre-calculus")
Topic: Homework question
Replies: 3
Views: 1245

Pre-calc question?  TOPIC_SOLVED

Hey! A model rocket is launched. The height, in feet, of the rocket h(t) at t (t>=0) seconds after launch is determined by the equation h(t)= (-1/2)t^2 + 15t. The maximum height of the rocket is 112.5 feet. (a) Find the number of seconds after launch it takes for the rocket to reach its maximum heig...
by Hell0
on Sun Sep 01, 2013 6:37 pm
 
Forum: Advanced Algebra ("pre-calculus")
Topic: Pre-calc question?
Replies: 3
Views: 1567

Re: Pre-calc question?  TOPIC_SOLVED

Hell0 wrote:for part b i plugged in 100 for h(t) and got 10 and 20. but i rejected 20 because thats higher than 15 which is the amount of time to reach the maximum height so that makes no sense.

theshadow wrote:why not? it goes up & then comes down right?

can you please explain further
by Hell0
on Mon Sep 02, 2013 10:36 am
 
Forum: Advanced Algebra ("pre-calculus")
Topic: Pre-calc question?
Replies: 3
Views: 1567

Help with functions  TOPIC_SOLVED

y= ±2x+7
y= rad(5-x) (all under the rad)
y= 1/(x+62) - 2
y= -3^x + 41 (no parentheses around the -3 purposely)

how many are functions? this is what i think

no, yes, yes, yes
what do you think and why?
by Hell0
on Tue Sep 03, 2013 1:32 am
 
Forum: Advanced Algebra ("pre-calculus")
Topic: Help with functions
Replies: 1
Views: 931
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