- Tue Sep 27, 2016 2:50 pm
- Forum: Beginning Algebra
- Topic: Solving Multi Step Equations
- Replies:
**1** - Views:
**17**

Hi everyone, we are needing help on [solving] a multi-step equation. \mbox{Solve }\, -x\, -\, 2\,=\, 3x\, +\, 5 In this [worked solution]: -x - 2 = 3x + 5 -1x - 2 = 3x + 5 -3x -3x ---------------- -4x - 2 = 0x + 5 <=== -4x - 2 = 5 -4x - 2 = 5 + 2 = +2 ------------ -4x + 0 = 7 -4x = 7 -4x = 7 --- --...

- Tue Sep 27, 2016 2:44 pm
- Forum: Geometry
- Topic: Two parallel lines cut by a curved line
- Replies:
**5** - Views:
**24**

How do you find x? It's not 38. Could it be 37? What is the use of the 75 angle? Lacking information regarding "x", "38", "37", "the 75 [degree?] angle", or any other information regarding this exercise, I'm afraid there is no way to proceed. Kindly please en...

- Thu Jul 14, 2016 6:43 pm
- Forum: Intermediate Algebra
- Topic: Sorry my ignorance but please help me to understand why x/sqr(x)
- Replies:
**2** - Views:
**576**

...he states that x/sqr(x) is equal to sqrt(x) which i obviously believe i typed x/sqrt(x) in wolfram alpha and it also gave me the result sqrt(x) but i don't understand why What did you get when you did the simplification? You noted that: \sqrt{ x^2\,}\, =\, x (for non-negative x) so: x\, =\, \lef...

- Thu Jul 14, 2016 6:34 pm
- Forum: Beginning Algebra
- Topic: Order of operations isn't working.
- Replies:
**3** - Views:
**406**

I don't understand math; that's why I'm here. I thought that I was doing pemdas exactly...addition comes before subtraction. It seems to me that I'm doing exactly what they gave me. No. As explained in ( this ) lesson, addition and subtraction are at the same "level" and are done at the s...

- Sun May 15, 2016 12:32 pm
- Forum: Calculus
- Topic: How to prove the following function is increasing function?
- Replies:
**5** - Views:
**590**

- Sun May 15, 2016 12:29 pm
- Forum: Calculus
- Topic: How to prove the following function is increasing function?
- Replies:
**5** - Views:
**590**

- Sun May 15, 2016 12:27 pm
- Forum: Calculus
- Topic: How to prove the following function is increasing function?
- Replies:
**5** - Views:
**590**

I am stuck on figuring out why the following function is a increasing function when I read a paper. The function is following f(x)\, =\, \dfrac{(x\, -\, 1)\, c^x\, -\, 2x\, c^{x-1}\,+\,x\,+\,1}{2^x\,-\,x\,-\,1}, \, \mbox{ with }\, 1\, <\, c\, <\, 2\, \mbox{ and }\, x\, >\, 2. This a...

- Sat May 07, 2016 1:22 pm
- Forum: Matrix (Linear) Algebra
- Topic: find rotation matrix in n dimention
- Replies:
**2** - Views:
**705**

A fairly complete reply is posted **here**.

- Thu Jan 28, 2016 10:04 pm
- Forum: Matrix (Linear) Algebra
- Topic: matrix notation
- Replies:
**1** - Views:
**581**

Apologies, but I'm drawing a blank. Kindly please provide the exact text (or scan) of the "something" which generated your query. Thank you.

- Wed Jan 06, 2016 9:39 pm
- Forum: Calculus
- Topic: One more question: line tangent to y=2 sin(2 x+(3pi/4)) at x=pi/8
- Replies:
**4** - Views:
**1177**

bookwrm98 wrote:So pull out the 2, then do the derivative of sin(f(x)), and the final derivative equals 4cos(2x+(3pi/4)), then just find the line from there. Is that right?

You are correct.