Anyone good at math here that can help me?

[kyubbi sagemode]

Can anyone help me with this it's on my Finals study guide and I don't understand it at all

A system of linear inequalities is shown below.
x - y > 3

y + x ≤ 2

Describe the steps to graph the solution set to the system of inequalities.

 

[FranklinGTAV]

i don't make counts with letters

 

[Naaruto]

the answer is 42

 

[Chisengan11]

ur in school currently dafuk

 

[ByakuganUser]

Tried... Don't know, sorry If it was with = instead of > i could help you

 

[griffnat13]

You must be registered for see links

 

[Leinad Sotam]

Wait a sec ....

 

[vandell]

google web math, youre welcome

 

[Sound]

My skills are rusty but it's something like this.

Spoiler

x - y > 3

y + x ≤ 2


x = 2-y → 2 - y > 3 → -y > 3-2 → y < -1

y + x ≤ 2 → y=2 - x → x - 2 - x > 3 → 2x > 3 → x < -3/2


You should learn the chapter you got this.

 

[Wolfus]

I'll help you out.

Lets start by isolating x in the first inequation

x > 3 + y

Now, let's do the same in the second on

x</= 2-y

Ok then. But if x</= 2 - y, and the same x > 3 + y, then

3 + y< 2- y

Then, we have 2y< -1, y<-1/2

In that case, if y< -1/2, and x> 3+y, then x> 5/2 (we replaced "y's limit value" in the inequation with x)

You can check it out by replacing x and y under those conditions

 

[Wolfus]

My skills are rusty but it's something like this.

Spoiler

x - y > 3

y + x ≤ 2


x = 2-y → 2 - y > 3 → -y > 3-2 → y < -1

y + x ≤ 2 → y=2 - x → x - 2 - x > 3 → 2x > 3 → x < -3/2


You should learn the chapter you got this.

You made a mistake there buddy. When you replaced x. You forgot about the first "-y"

 

[Sound]

You made a mistake there buddy. When you replaced x. You forgot about the first "-y"

Yes you're right. I solved on a paper and afterwards resolved on the computer. I wondered why I got a different result.
OP go with this guy solution. Anyway I fixed it.

Spoiler

x - y > 3
y + x ≤ 2

x = 2 - y

2 - y - y > 3

2 - 2y > 3

-2y > 3 - 2

-2y >1

y < -1/2



y = 2 - x

x-2 - x > 3

-2x -2 > 3

-2x >3+ 2

-x > 5/2

x < - 5/2​

Spoiler

​

 

[Wolfus]

Yes you're right. I solved on a paper and afterwards resolved on the computer. I wondered why I got a different result.
OP go with this guy solution. Anyway I fixed it.

Spoiler

x - y > 3
y + x ≤ 2

x = 2 - y

2 - y - y > 3

2 - 2y > 3

-2y > 3 - 2

-2y >1

y < -1/2



y = 2 - x

x-2 - x > 3

-2x -2 > 3

-2x >3+ 2

-x > 5/2

x < - 5/2​

Spoiler

​

Sorry, but there's another mistake there. When you replace y. It would be x-(2-x). Then 2x would be positive, resulting in x> 5/2

 

[Leinad Sotam]

Done sorry for the time I was looking for the transfer cable for my cam.
I did it using the substitution method

You must be registered for see images

 

[Sound]

Sorry, but there's another mistake there. When you replace y. It would be x-(2-x). Then 2x would be positive, resulting in x> 5/2

Sign multiplication right. You don't have to be sorry.
Thanks for looking into this. I screwed up lol.

 

[Wolfus]

Sign multiplication right. You don't have to be sorry.
Thanks for looking into this. I screwed up lol.

No problem man. It happens everytime, with everyone.