- 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:
**1** - Views:
**23**

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...

- Thu Nov 12, 2015 7:52 pm
- Forum: Trigonometry
- Topic: Finding all the solutions of the equation
- Replies:
**4** - Views:
**61**

daz1990 wrote:Find all the solutions to the following equation

2Sin^{2}(2x) + 4Sin(2x) = 4.003

where 0^{o}< x < 360^{o}

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.

- 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:
**86**

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.

- Wed Nov 11, 2015 11:04 pm
- Forum: Beginning Algebra
- Topic: Need Help With Word Problem
- Replies:
**1** - Views:
**32**

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...

- Sun Aug 30, 2015 12:37 pm
- Forum: Advanced Algebra ("pre-calculus")
- Topic: root in denominator - how to get this result?
- Replies:
**4** - Views:
**306**

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...

- Thu Aug 27, 2015 6:42 pm
- Forum: Beginning Algebra
- Topic: Need help to reduce this equation: x = (a+(0.1725*x)+(0.2*x)) - (0.2*a)
- Replies:
**1** - Views:
**195**

I need to reduced the following so that I can determine the value of 'x' x = (a+(0.1725*x)+(0.2*x)) - (0.2*a) Not sure what you mean by 'reduced'. Just times it out, simplify, and solve. (a+(0.1725*x)+(0.2*x)) - (0.2*a) a+0.1725x + 0.2x - 0.2a 1a - 0.2a + 0.1725x + 0.2x (1 - 0.2)a + (0.1725 + 0.2)x...

- Tue Aug 18, 2015 1:44 am
- Forum: Intermediate Algebra
- Topic: Roots of exponential expressions
- Replies:
**3** - Views:
**308**

I would like to have a bit more specific details on what makes a problem like this \sqrt{b^1^8}=\left| b^9 \right| From your second post it looks like you mean this: \sqrt{b^{18}\,}\, =\, \left|\, b^9\, \right| End up with an absolute value. I am having trouble comprehending what determines the ans...

- Tue Aug 18, 2015 1:42 am
- Forum: Discrete Math
- Topic: How many combinations
- Replies:
**3** - Views:
**346**

I'm trying to research a lottery game. The game goes like this. Select 12 numbers from 1-24. Get all 12 correct, win grand prize. Get none correct win grand prize. I've found a trend where the game will draw a certain combination of numbers every few games. It will draw 2 numbers from 1-4, 2 number...

- Wed Aug 12, 2015 3:55 pm
- Forum: Beginning Algebra
- Topic: Rearranging Formulae
- Replies:
**5** - Views:
**391**

This is our attempt.... R=(u+v^2)/(u+v) R(u+v)=(u+v^2) times both sides by (u+v) Ru+Rv=u+v^2 multiply out LHS Ru+Rv-u=v^2 start collecting terms on LHS bu doing a -u Ru-u=v^2-Rv then a -Rv u(R-1)=v^2-Rv Factorise LHS <== u=v^2-Rv/R-1 divide by (R-1) Your meth...

- Thu Aug 06, 2015 8:53 pm
- Forum: Uncategorized
- Topic: making cubes
- Replies:
**7** - Views:
**463**

A proper proof is more than I'd care to get into, but page 13 of this PDF confirms your result of 333.