- Wed Jun 24, 2015 9:36 pm
- Forum: Geometry
- Topic: Need help with a sphere
- Replies:
**1** - Views:
**76**

I have created a circle with points; this wasn't that hard. Now, I want to create a sphere using points. I'm not really sure what you're doing, but maybe spherical coordinated might help ( here ). You know the center and radius from the circle. Can you plug these into spherical coordinates to get t...

- Wed Jun 10, 2015 12:37 am
- Forum: Advanced Algebra ("pre-calculus")
- Topic: How to write an equation for an ellipse using height and width
- Replies:
**4** - Views:
**139**

If you look at the second problem and answer then I would think that a = 1/3 and b=1/4 and my answer would be the reverse of the answer given You're actually right and the answer they gave you is wrong. You can check by graphing. Look at the graph of their equation: https://www.wolframalpha.com/inp...

- Mon Jun 08, 2015 4:27 pm
- Forum: Beginning Algebra
- Topic: Can't get fraction out of an equation
- Replies:
**2** - Views:
**121**

At the link is this: Find equation of line. Write in f(x) Through (-5, -7); paralells [sic] 6x + 5y = 11 a) find slope 6x + 5y = 11 -6x . . . . . -6x 5y = 11 - 6x y = (11 - 6x)/5 y = 11/5 - (6/5)x b) y - y1 = m(x - x1) y - -7 = -(6/5)(x - -5) y + 7 = -(6/5)(x + 5) 5(y + 7) = 5*(-6/5)(x + 5) 5y + 35 ...

- Mon Jun 08, 2015 4:17 pm
- Forum: Advanced Algebra ("pre-calculus")
- Topic: How to write an equation for an ellipse using height and width
- Replies:
**4** - Views:
**139**

Yes (if you're saying that your a^2 is bigger than your b^2). It's like they show here.

- Mon Jun 08, 2015 4:15 pm
- Forum: Advanced Algebra ("pre-calculus")
- Topic: How to find the center and radius of a circle with a large term
- Replies:
**3** - Views:
**133**

mathpatient wrote:How can I find the center and radius of a circle given this equation:

x^2 + 4x + y^2 + 4y + (71/4)

This isn't an equation b/c there isn't an "=" in it. W/o that, you can't get the center or radius.

- Wed Jun 03, 2015 9:54 pm
- Forum: Intermediate Algebra
- Topic: Rational Expression Multiplication
- Replies:
**1** - Views:
**103**

I have worked and reworked the multiplication below, but can't get the correct answer. What did you do? What did you get? \left(\dfrac{ab-a+3b-3}{ab+a+4b-4}\right)\times \left(\dfrac{ab+2a-4b-8}{ab+2a+3b-6}\right) Do factoring in pairs. They show how here . ab - a + 3b - 3 = (ab - a...

- Fri May 29, 2015 11:19 am
- Forum: Advanced Algebra ("pre-calculus")
- Topic: vector to polar coordinates....help!
- Replies:
**1** - Views:
**157**

1) Given a vector L= 47 -j 33 I don't understand the "vectors" you're using. Why is "33" after the unit vector j instead of before? Or is "33" supposed to be an exponent of some kind? What vector is supposed to go with the "47"? What have you tried so far? Se...

- Fri May 29, 2015 11:14 am
- Forum: Discrete Math
- Topic: Another way to write the XOR Operator.
- Replies:
**1** - Views:
**122**

Does anyone know what is the equivalence of the XOR operator if you were to do this p XOR q ? I have to do draw the circuit diagram for that expression without using the XOR gate. Basically what I'm asking is what logical connectives would be the equivalent of writing p XOR q in terms of ~ ^ and v?...

- Fri May 29, 2015 11:10 am
- Forum: Beginning Algebra
- Topic: Surveying mathematics: Vectors and Areas
- Replies:
**3** - Views:
**140**

patchy1 wrote:It's more just vectors and areas isn't it?

I don't know what you're supposed to do with the plat map, or what things like "ones of minutes" mean, so I don't know what's required. Sorry. You'd need to explain all the geocaching stuff.

- Fri May 22, 2015 4:12 pm
- Forum: Calculus
- Topic: Is it possible to evaluate this integral without a calculator?
- Replies:
**3** - Views:
**171**

stapel_eliz wrote:CollinR wrote:What I am wondering is if it is even possible to evaluate this integral without a calculator.

The result, from Wolfram Alpha, seemsfairly unwieldy.

CollinR wrote:After this, I can just use integration by parts, correct?

After what? The answer from Wolfram?