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Mathematics 7 Online
OpenStudy (anonymous):

~~~~~~~~~~~~~~~FAN AND MEDAL~~~~~~~~~~~~ The graph below is represented by which system of inequalities? x − y > 5 and 3x + y > 3 x − y < 5 and 3x + y < 3 x − y < 5 and 3x + y > 3 x − y > 5 and 3x + y < 3

OpenStudy (anonymous):

OpenStudy (anonymous):

Solve for y to find the functions. Here's the first one written out: |dw:1383524341838:dw| then you can graph to see which ones work The shaded part is to the right, so it's going to be > .

OpenStudy (anonymous):

Are you asking me lol?

OpenStudy (anonymous):

I think its the first one..... x - y > 5 -y > -x + 5 -->(-1) y < x - 5 y int = -5, slope = 1, less then means shaded below the line 3x + y > 3 y > -3x + 3 y int = 3, slope = -3, greater then means it is shaded above the line you might want to get a second opinion....I am not the best at graphing

OpenStudy (anonymous):

It sounds pretty right to me :)

OpenStudy (anonymous):

I think so...but like I said, graphing is not one of my better subjects

OpenStudy (anonymous):

lol ok let me see if @hero can confirm it

hero (hero):

Just simply test a point in the solution region

OpenStudy (anonymous):

where is that?

OpenStudy (anonymous):

Where it says Equation?

hero (hero):

The solution region is the green area. There are points in that region. Test them out.

OpenStudy (anonymous):

uh-oh....I think it is the 3rd one because a point in the green section (3,1) 3rd answer choice : x - y < 5 3x + y > 3 3 - 1 < 5 3(3) + 1 > 3 2 < 5 (correct) 9 + 1 > 3 10 > 3 (correct)

OpenStudy (anonymous):

option c?

OpenStudy (anonymous):

Hero said a set of points in the green section will make the inequality true. The set of points I picked was (3,1). It makes the inequalities in the answer choice C true. I would go with C

OpenStudy (anonymous):

Okay thank you!

OpenStudy (anonymous):

sorry about the wrong answer in the beginning

OpenStudy (anonymous):

Hero helped a lot on this one

OpenStudy (anonymous):

Its Perfectly fine lol , I wasnt done with it yet

OpenStudy (anonymous):

I am so glad you did not turn it in yet

hero (hero):

The graph was made to be tricky though. If you graphed the system in desmos, you'll see how it is supposed to look.

hero (hero):

Your teacher is wrong for not properly representing the system

OpenStudy (anonymous):

you saved my butt again Hero....thanks

hero (hero):

Here's how the actual graph looks. From there, it is clear to see what the overlapping region is. https://www.desmos.com/calculator/dimuhgzpw0

OpenStudy (anonymous):

That makes a difference

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