testing header
Math Goodies is a free math help portal for students, teachers, and parents.
Free Math
Newsletter
 
 
Interactive Math Goodies Software

Buy Math Goodies Software
testing left nav
Math Goodies on facebook

Math Goodies Blog
Math Forums @ Math Goodies
Math Forums @ Math Goodies
Home | Profile | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 Homework Help Forums
 Algebra
 t-chart with problem
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

vbravo
Average Member

USA
9 Posts

Posted - 03/24/2013 :  19:08:34  Show Profile  Reply with Quote
I am not sure how to use a t-chart to figure out this problem.

-2x – y ≥ 4
Y ≥ -2
X ≥ -6

Go to Top of Page

TchrWill
Advanced Member

USA
80 Posts

Posted - 03/25/2013 :  11:28:52  Show Profile  Reply with Quote
quote:
Originally posted by vbravo

I am not sure how to use a t-chart to figure out this problem.

-2x – y ≥ 4
Y ≥ -2
X ≥ -6





Is your problem one dealing with T-Numbers and/or T-Totals?

Might you be able to explain the hieroglyphics?
Go to Top of Page

vbravo
Average Member

USA
9 Posts

Posted - 03/26/2013 :  03:11:09  Show Profile  Reply with Quote
I'm not sure why it posted that way, here is the problem again,

Graph the solution set of the system.


-2x-y4
y-2
x-6

*What I don't understand is how to use the t-chart to figure out the solution, I don't understand what numbers to start on the t-chart to figure out the solution. I know it looks like a T and you place the x on the top left and the y on the top right. Then you start to enter numbers below the line under each letter to find the solution, problem is that I don't understand what numbers do I start with?

Thank you for your help,
~Virginia

Edited by - vbravo on 03/26/2013 03:12:54
Go to Top of Page

Ultraglide
Advanced Member

Canada
299 Posts

Posted - 03/26/2013 :  18:16:42  Show Profile  Reply with Quote
First, graph the two inequalities, x-6 and y-2.
Then graph -2x-y=4 (just the equality). It may help by rearranging it to y = -2x-4. Be careful with this one, remember if you include he inequality, it is now y-2x-4
Now, decide where the region that satisfies all the inequalities lies remembering that you include the boundary lines.
Go to Top of Page

vbravo
Average Member

USA
9 Posts

Posted - 03/26/2013 :  20:51:55  Show Profile  Reply with Quote
Okay now I'm confused. Can you break it down to steps?
Go to Top of Page

Ultraglide
Advanced Member

Canada
299 Posts

Posted - 03/27/2013 :  10:54:19  Show Profile  Reply with Quote
With these types of graphs, you get a region.
Graph x=-6, y=-2 and y=-2x-4.
Since you want x-6, the region is to the right of the line x=-6.
Since you want y-2, the region is above y=-2.
Now rearrange -2x-y4 to give y-2x-4, the region is below the line y=-2x-4.
We include the lines because each of the inequalities is ''.
What you get is a right triangle.
If you want to find the domain, it is greater than or equal to -6 and less than or equal to the point where the line y=-2x-4 intersects the line y=-2. If you want to find the range, it is greater than or equal to -2 and less than or equal to the point where the line y=-2x-4 intersects the line x=-6.
Go to Top of Page

vbravo
Average Member

USA
9 Posts

Posted - 03/27/2013 :  19:51:09  Show Profile  Reply with Quote
Thank you, I think I understand it now.
~Virginia
Go to Top of Page

Ultraglide
Advanced Member

Canada
299 Posts

Posted - 03/28/2013 :  20:03:09  Show Profile  Reply with Quote
Your result is a right triangle with y=-2x-4 as the hypotenuse
Go to Top of Page

vbravo
Average Member

USA
9 Posts

Posted - 03/29/2013 :  18:17:54  Show Profile  Reply with Quote
Thank you
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Math Forums @ Math Goodies © 2000-2004 Snitz Communications Go To Top Of Page
This page was generated in 0.05 seconds. Snitz Forums 2000
testing footer
About Us | Contact Us | Advertise with Us | Facebook | Blog | Recommend This Page




Copyright © 1998-2015 Mrs. Glosser's Math Goodies. All Rights Reserved.

A Hotchalk/Glam Partner Site - Last Modified 25 Jan 2015