- Tue Dec 16, 2008 12:32 pm
- Forum: Advanced Algebra ("pre-calculus")
- Topic: find the constant c that makes g continuous (g in two parts)
- Replies:
**1** - Views:
**6832**

- Mon Dec 15, 2008 1:43 am
- Forum: Calculus
- Topic: find limit of (sin 4x) / (sin 6x) as x goes to zero
- Replies:
**2** - Views:
**8938**

- Sun Dec 14, 2008 1:58 pm
- Forum: Matrix (Linear) Algebra
- Topic: formatting matrices using LaTeX and 'pre' tags
- Replies:
**0** - Views:
**2976**

LateX (pronounced "LAY-teck"): . . . . . [t ex]\left[ \begin{array} {rrr} 1&2&3 \\ 4&5&6 \\ 7&8&9 \end{array} \right][/tex] ...produces: . . . . . \left[ \begin{array} {rrr} 1&2&3 \\ 4&5&6 \\ 7&8&9 \end{array} \right] ...while: . . . . . [pre...

- Sun Dec 14, 2008 1:41 pm
- Forum: Pre-Algebra
- Topic: find normal and overtime rates of pay for carpenter
- Replies:
**3** - Views:
**5083**

- Wed Dec 10, 2008 7:35 pm
- Forum: Forum Rules & Guides
- Topic: trying out some of the formatting
- Replies:
**4** - Views:
**5091**

- Wed Dec 10, 2008 6:27 pm
- Forum: Discrete Math
- Topic: find value of (x - a)(x - b)(x - c) ... (x - z)
- Replies:
**2** - Views:
**5518**

- Wed Dec 10, 2008 12:36 am
- Forum: Trigonometry
- Topic: angle of depression and how tall is romeo
- Replies:
**1** - Views:
**4363**

- Tue Dec 09, 2008 9:40 pm
- Forum: Statistics
- Topic: mean of 8 numbers is 3, mean of 12 is x, mean of all is 9
- Replies:
**2** - Views:
**4046**

My thinking: Since the average of the 8 numbers is 3, and you find this average by dividing the total by 8, then that total is 8*3 = 24, right? So would the total of the others be 12*x, with the combined total being 20*9 = 180? And then you add the two smallers numbers and make this equal to the co...

- Mon Dec 08, 2008 6:29 pm
- Forum: Beginning Algebra
- Topic: Solve 2^(2x) - 7(2^x) - 8 = 0 (Hint: Let y = 2^x)
- Replies:
**1** - Views:
**3933**

I think this gives me y^2 - 7y - 8 = 0. Is that right? That's exactly right! :wink: Now factor, and set each factor equal to zero. Once you've done that, plug the 2^x back in for the y, and use what you know about powers to find the answers. If you get stuck, please reply showing how far you got. T...

- Mon Dec 08, 2008 6:17 pm
- Forum: Arithmetic
- Topic: THINK + RETHINK = REFLECT (each letter stands for a number)
- Replies:
**2** - Views:
**4698**