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by theshadow
Sat Jan 23, 2016 1:12 pm
Forum: Beginning Algebra
Topic: LCD inquiry
Replies: 3
Views: 141

Re: LCD inquiry

magellan333 wrote:The instructions were to find the LCD of the three. I factored as follows:

X-7 = x-7
3x-21 = 3(x-7)
6x=6x

Therefore my answer was x-7, 3 and 6x.

Okay. Now, after you've read the lesson in the link and factored the 6 in the 6x, what are you getting?
by theshadow
Wed Jan 20, 2016 11:35 pm
Forum: Beginning Algebra
Topic: LCD inquiry
Replies: 3
Views: 141

Re: LCD inquiry

X-7, 3x-21, 6x My answer was 3, x-7, 6x "Your answer" to what? What did the instructions tell you to do? Correct answer per the book is 6x, x-7. If the instructions said to get the factors for the LCD then this answer is right. You can see why here (the last bit of the lesson shows polys;...
by theshadow
Sat Jan 16, 2016 1:01 am
Forum: Beginning Algebra
Topic: How do I know the order (simple I know!)
Replies: 1
Views: 104

Re: How do I know the order (simple I know!)

I have to subtract one equation from another to get my answer. I have to subtract S=0.1M + 18660 from S=5M - 174200. How and why do I know to do S=(5M - 0.1M) - (174200 +18660)? I mean why would I not do '0.1M - 5M'? They said to take 0.1M + 18,600 FROM 5M - 174,200. You're saying you want to do it...
by theshadow
Sun Dec 27, 2015 1:49 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: F of X g of x
Replies: 1
Views: 298

Re: F of X g of x

I've been racking my brain trying to...figure out the mathematics essentially given an equation for f(x) such as 2x+1 and f (3)=g (1) solve for g (x) how would I go about doing this mathematically You say "essentially". What is the question "exactly" (and the instructions)? Than...
by theshadow
Tue Dec 22, 2015 9:16 pm
Forum: Beginning Algebra
Topic: Please show steps of factoring: X + (X*.06) = 273.45, X = ?
Replies: 1
Views: 206

Re: Please show steps of factoring: X + (X*.06) = 273.45, X = ?

X + (X*.06) = 273.45 X = ? The 2nd term (X*.06) means (X) * (0.06) or 0.06 * X. The 1st term X means (X) * (1) or 1 * X. If you write it like: 1*X + 0.06*X = 273.45 Now factor out the X , simplify what's in the parens, divide off, and simplify to get the answer. If you get stuck, plz write back sho...
by theshadow
Sat Nov 21, 2015 11:38 pm
Forum: Trigonometry
Topic: Solve equation for a roof loading: =[2 x (3/2)Cos(45) x 1] x 2.25
Replies: 3
Views: 363

Re: Solve equation for a roof loading: =[2 x (3/2)Cos(45) x 1] x 2.25

I have an equation for a roof loading: =[2 x (3/2)Cos(45) x 1] x 2.25 What is the rest of the eqn? Whats on the left side4 of the "="? which is: 4.24x2.25 = 9.54 Is this maybe just an expression or what you got out of a formula? anyway, the only way to get 4.24 out of the bracketed part i...
by theshadow
Thu Nov 12, 2015 7:52 pm
Forum: Trigonometry
Topic: Finding all the solutions of the equation
Replies: 4
Views: 225

Re: Finding all the solutions of the equation

daz1990 wrote:Find all the solutions to the following equation

2Sin2(2x) + 4Sin(2x) = 4.003
where 0o < x < 360o

If they gave you 2x^2 + 4x = 4.003, what would you do? Do the same thing here. Then use your calc to get the solns to the trig eqns.
by theshadow
Thu Nov 12, 2015 7:50 pm
Forum: Beginning Algebra
Topic: You earn 15n dollars for mowing n lawns. How much do you earn for mowing one lawn?seven lawns?
Replies: 1
Views: 358

Re: You earn 15n dollars for mowing n lawns. How much do you earn for mowing one lawn?seven lawns?

anna wrote:You earn 15n dollars for mowing n lawns. How much do you earn for mowing one lawn? seven lawns?

What did you get when you plugged 1 in for n? when you plugged 7 in for n? Where are you stuck? Plz show ALL steps. Thanks.
by theshadow
Wed Nov 11, 2015 11:04 pm
Forum: Beginning Algebra
Topic: Need Help With Word Problem
Replies: 1
Views: 220

Re: Need Help With Word Problem

The Product of two consecutive integers is 17 less than the square of the larger integer. Find the integers. I started with let x+1 = integer 1 and x+2= integer 2 You could use "x" and "x + 1", too. But either way works. Just remember to add the 1 and the 2 to "find the int...
by theshadow
Sun Aug 30, 2015 12:37 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: root in denominator - how to get this result?
Replies: 4
Views: 509

Re: root in denominator - how to get this result?

Point A: \dfrac{1}{\sqrt{a^2\, +\, b^2}}\, -\, \dfrac{1}{\sqrt{a^2}} Point B: 1\, -\, \dfrac{1}{\sqrt{1\, +\, \dfrac{b^2}{a^2}} Yes, that is what I meant.... I can't even figure out how to get started. Can you give me a hint what would be Step 1? When you have fractions, it can help to see what hap...

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