Need some help please

**kwtolley** · July 28th 2006, 01:01 AM

The minimum value of z=4x+10y subject to
3x+y<=to24
6x+4y<=to66
x>=to0,y>=to 0. is.

My answer after looking at a list of possible answers is 32, is this right.
a.165
b.110
c.44
d.32
Thanks for any help given.

**galactus** · July 28th 2006, 04:13 AM

Yep, that's what I got.

**Soroban** · July 28th 2006, 02:07 PM

Hello, kwtolley!

Am I reading it wrong?
Are there typos in the problem?

The minimum value of $z \:=\:4x+10y$ subject to: $\begin{Bmatrix}3x+y\,\leq\,24 \\ 6x+4y\,\leq\,66 \\ x \geq 0\\ y \geq 0\end{Bmatrix}$ is:

$a)\;165\qquad b)\;110\qquad c)\;44\qquad d)\;32$

Doesn't $x = 0,\;y = 0$ satisfy the inequalties?

**galactus** · July 28th 2006, 03:01 PM

By Jove, Soroban, I think you're right. Here's the graph.

**galactus** · July 28th 2006, 03:13 PM

Soroban, I just ran this through the Linear Programming solver in Maple and it gave me (0,0) as the minimum. I looked right past the origin.

Looks like the list of answers is omitting the correct minimum. That's why you're the man and I'm just a dogface

.

Good 'ketch'

.

**kwtolley** · July 29th 2006, 01:20 AM

Thats what I thought it would be, 32. Thanks so much for checking my answer.

**ThePerfectHacker** · July 29th 2006, 05:18 PM

galactus are you using the program I use? If you are, how you like it?

**galactus** · July 29th 2006, 05:36 PM

I like it a lot. What's even better, it's free. It's that Padowan thing; I downloaded it. I sometimes have trouble getting it to shade what I want to shade, but other than that it's great. Is this what you have?.

**ThePerfectHacker** · July 29th 2006, 06:04 PM

Originally Posted by galactus

Is this what you have?.

Same one you have. Great thing it is free. Also safe, cuz many free programs are adware. Finally, do you know it can approximate a set a points with different curves?

**JakeD** · July 29th 2006, 07:19 PM

Originally Posted by kwtolley

The minimum value of z=4x+10y subject to
3x+y<=to24
6x+4y<=to66
x>=to0,y>=to 0. is.

My answer after looking at a list of possible answers is 32, is this right.
a.165
b.110
c.44
d.32
Thanks for any help given.

As Soroban noted, the minimum value is 0, not on the list. So there is a typo. From this linear programming solver, which you can use to both solve the problem or check your work, the maximum value is 165, answer a.

If you have linear programming problems to solve in the future, you may want to bookmark that solver.

**galactus** · July 30th 2006, 01:50 AM

Originally Posted by ThePerfectHacker

Same one you have. Great thing it is free. Also safe, cuz many free programs are adware. Finally, do you know it can approximate a set a points with different curves?

No, I haven't delved into that feature. It's very user friendly.

Thread: Need some help please

LinkBack

Thread Tools

Display

Need some help please

Thanks to you both