- Tue Nov 03, 2015 12:10 am
- Forum: Forum Rules & Guides
- Topic: Log In
- Replies:
**1** - Views:
**119**

If you figure out the answer, will you please let me know? it drives me nuts!

- Wed Oct 14, 2015 7:54 pm
- Forum: Matrix (Linear) Algebra
- Topic: Linear Algebra: Transposes
- Replies:
**1** - Views:
**115**

Section 2.7. Problem 40: Suppose Q T equals Q -1 (transpose equals inverse, so Q T Q = I ). . . . (a) Show that the columns q 1 , ..., q n are unit vectors: || q i || 2 = 1. . . . (b) Show that every two distinct columns of Q are perpendicular: q i T q j = 0 for i != j . . ....

- Mon Oct 12, 2015 4:43 pm
- Forum: Pre-Algebra
- Topic: indicated operation and
- Replies:
**1** - Views:
**173**

bettybad5 wrote:Perform the indicated operation and, if possible, simplify

5/8 + 2/7

You can learn how to add fractions here and here. Before you try the problem, do at least 2 or 3 lessons from the links. Then do the common denominator (or LCM) of 8 and 7 (its 56) to get 35/56 and 16/56. Then add, etc.

- Fri Oct 09, 2015 1:19 am
- Forum: Geometry
- Topic: Calculating angles for a physical regular icosahedron
- Replies:
**1** - Views:
**145**

Are you looking for something like what they show in this video?

- Wed Sep 30, 2015 12:45 pm
- Forum: Uncategorized
- Topic: Question
- Replies:
**4** - Views:
**153**

Alfred wrote:It's "puzzle style" and I know the answer...

What is "puzzle style"?

- Tue Sep 15, 2015 2:28 pm
- Forum: Calculus
- Topic: Need help with: If dy/d(theta)=5, dr/d(theta)=18, and y=40, what is theta?
- Replies:
**3** - Views:
**107**

TDavenport wrote:this is the entire problem. It's entirely possible considering the fact that someone else in my class has already solved it.

Cool. Show us how he did it. Thnx.

- Tue Sep 15, 2015 11:04 am
- Forum: Calculus
- Topic: Need help with: If dy/d(theta)=5, dr/d(theta)=18, and y=40, what is theta?
- Replies:
**3** - Views:
**107**

- Tue Sep 15, 2015 11:00 am
- Forum: Calculus
- Topic: Integral of e^(2x)*sinx
- Replies:
**2** - Views:
**234**

I'm having trouble finding the integral of e^(2x)*sinx. https://www.symbolab.com/solver/definite-integral-calculator/%5Cint%20e%5E%7B2x%7Dsinx%20dx/?origin=enterkey On the link above, I follow up until the step where it says to isolate. I don't what isolate means in this context and it seems like i...

- Thu Sep 03, 2015 2:11 pm
- Forum: Uncategorized
- Topic: array fun
- Replies:
**3** - Views:
**177**

I think what you're looking for is the reverse of this. I think this article gives you the maximum number of flips. I can't find anything about the minimum though. Sorry. Maybe somebody else will find something.

- Thu Sep 03, 2015 1:05 pm
- Forum: Calculus
- Topic: Need help with Exponential Growth and Differential Equation
- Replies:
**1** - Views:
**176**

a) On January 1 2000, the park estimated that they had 500 deer on their land. Two years later, they estimated that there were 550 deer on the land. Assume that the number of deer was changing exponentially, i.e. P(t)=ae^bt where P is the number of deer at year t, and a and b are parameters.Find th...