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by QM deFuturo
Wed Aug 26, 2009 1:26 am
Forum: Beginning Algebra
Topic: 4^(2X)=10: solve for value of X in exponent
Replies: 5
Views: 2765

Re: 4^(2X)=10: solve for value of X in exponent

Use a log base 10. :lol: Here are the steps. :idea: 4^2x=10 2x log^10 4=10 2x=10/log 4 x=(10/ log 4) /2 :shock: But I am 12, so I could be wrong In math and science, your age is not important. The right answer is the right answer, no matter how old you are. In your case though, you forgot to take t...
by QM deFuturo
Sat Aug 15, 2009 8:49 pm
Forum: Intermediate Algebra
Topic: Domain and Range of f = 2x+1, x < 0; f = 2x+2, x >= 0
Replies: 4
Views: 10545

Re: Domain and Range of f = 2x+1, x < 0; f = 2x+2, x >= 0

My bad. I should have explain that part. (a) and (b) are just 2 extra parts of the question. f(x)= {2x+1 , x <0 f(x)= {2x+2, x >=0 (x is greater or equal to 0) I believe I would just do this, replace x with the number 1 for part (a), and then find the range and domain. Which I do not know how to? f...
by QM deFuturo
Fri Aug 14, 2009 1:05 am
Forum: Intermediate Algebra
Topic: Help! Summer work for Pre-Calc, Completing the square
Replies: 7
Views: 1996

Re: Help! Summer work for Pre-Calc, Completing the square

C'mon stapel, you wouldn't have this problem if you just installed that mind-reading software plugin for the website. :roll:

QM :mrgreen:
by QM deFuturo
Thu Aug 13, 2009 6:43 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: logarithm stumper
Replies: 2
Views: 1702

logarithm stumper

I found this puzzle on another site and spent several hours on it, and am utterly humbled by it! I don't even know if it is really solvable, but I'm guessing it is and I just can't figure this out. Note, I know how to apply the change of base formula, and have tried every permutation I can think of ...
by QM deFuturo
Thu Aug 13, 2009 6:30 pm
Forum: Intermediate Algebra
Topic: and/or inequalities: solution set for -4x>2 and x+1>6
Replies: 1
Views: 1350

Re: and/or inequalities

"and" indicates a "conjunction", which means both equations have to be satisfied in the solution set. First, solve each inequality for x. Then, graph each on it's own number line, one on top of the other. Then, look where the graphs of *both* number lines are the same, and that w...
by QM deFuturo
Thu Aug 13, 2009 1:08 am
Forum: Intermediate Algebra
Topic: Finding the domain of radical, rational, polynomial fcns
Replies: 2
Views: 2551

Re: Finding the domain of radical, rational, polynomial fcns

I was wondering if I did this part of my homework correctly. Thanks your input would be greatly appreciated. :) State the domain of the following: :) g(x)=(2x+1)/(x-7) domain= all numbers x different form 0 e) m(x)=3/(x^2+7) domain = all numbers x different from 0 Well, as they say, you're "ge...
by QM deFuturo
Thu Aug 13, 2009 12:57 am
Forum: Arithmetic
Topic: math: why does -3(-3) = +3? how is this solved?
Replies: 2
Views: 1965

Re: math: why does -3(-3) = +3? how is this solved?

Hello, I have a quick question. why does -3(-3) = +3 how is this solved? thx. Is this supposed to be a multiplication problem? I.e, are you multiplying negative 3 by itself? If so, then your equation is not correct. If you just ignore the minus sign for the moment, what is 3 times 3? It's not 3! Wh...
by QM deFuturo
Wed Aug 12, 2009 12:17 am
Forum: Beginning Algebra
Topic: Solve 2^2+5x+6 =-x^2-2x for x by factoring
Replies: 5
Views: 2678

Re: Solve for x by factoring

You want to combine like terms and get everything on one side of the equation, to end up with something in the form of

ax^2 + bx + c = 0


Then you can factor this equation using the various procedures for factoring a quadratic equation.

QM
by QM deFuturo
Tue Aug 11, 2009 8:15 pm
Forum: Arithmetic
Topic: math: don't understand how to simplify | 2 + 3 ( -4 )
Replies: 2
Views: 2272

Re: math: don't understand how to simplify | 2 + 3 ( -4 )

Is this an absolute value problem? If so the last line of the absolute value symbol was left out of your original problem. I'm going to assume this is supposed to be |2+3(-4)| First, just solve the inside part of the absolute value, i.e., 2+3(-4) Do you know how to solve this? Then remember the defi...
by QM deFuturo
Tue Aug 11, 2009 7:19 am
Forum: Intermediate Algebra
Topic: Quadratic form help: x^2 - 3x + 1 = 0
Replies: 4
Views: 1796

Re: Quadratic form help

It looks like you are trying to use the quadratic formula. I would suggest first you review it here: http://www.purplemath.com/modules/solvquad4.htm Next, double check the formula, and what you are using as values for A, B, and C. It usually helps to actually write down these values at the top of yo...

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