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vbravo
Average Member

USA
9 Posts

 Posted - 03/24/2013 :  19:08:34 I am not sure how to use a t-chart to figure out this problem.-2x – y ≥ 4Y ≥ -2X ≥ -6

TchrWill

USA
80 Posts

 Posted - 03/25/2013 :  11:28:52 quote:Originally posted by vbravoI am not sure how to use a t-chart to figure out this problem.-2x – y ≥ 4Y ≥ -2X ≥ -6Is your problem one dealing with T-Numbers and/or T-Totals?Might you be able to explain the hieroglyphics?

vbravo
Average Member

USA
9 Posts

 Posted - 03/26/2013 :  03:11:09 I'm not sure why it posted that way, here is the problem again,Graph the solution set of the system.-2x-y4y-2x-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

Ultraglide

299 Posts

 Posted - 03/26/2013 :  18:16:42 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-4Now, decide where the region that satisfies all the inequalities lies remembering that you include the boundary lines.

vbravo
Average Member

USA
9 Posts

 Posted - 03/26/2013 :  20:51:55 Okay now I'm confused. Can you break it down to steps?

Ultraglide

299 Posts

 Posted - 03/27/2013 :  10:54:19 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.

vbravo
Average Member

USA
9 Posts

 Posted - 03/27/2013 :  19:51:09 Thank you, I think I understand it now.~Virginia

Ultraglide

299 Posts

 Posted - 03/28/2013 :  20:03:09 Your result is a right triangle with y=-2x-4 as the hypotenuse

vbravo
Average Member

USA
9 Posts

 Posted - 03/29/2013 :  18:17:54 Thank you
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