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Mathematics 21 Online
OpenStudy (anonymous):

Help please! Which of the following points lie in the solution set to the following system of inequalities? y > -3x + 3 y > x + 2 (2, -5) (-2, 5) (2, 5) (-2, -5)

jimthompson5910 (jim_thompson5910):

If a point lies in the solution set, then it has to make ALL of the inequalities true Plug the point (2,-5) from choice A into the first inequality y > -3x + 3 -5 > -3(2) + 3 ... replace x with 2, y with -5 -5 > -6 + 3 -5 > -3 The last inequality is false. So (2,-5) is NOT a solution. It needs to make both inequalities true. Because of this, choice A has been eliminated as a possible answer.

jimthompson5910 (jim_thompson5910):

I'll let you check the other points. For each answer choice (B through D), make sure you check both inequalities.

OpenStudy (anonymous):

Alright, Lemme figure it out, thank you for helping me though this lol

jimthompson5910 (jim_thompson5910):

Sure thing. Let me know what you get.

OpenStudy (anonymous):

So far I determined that B is not a choice.

OpenStudy (anonymous):

I'm gonna go with C

jimthompson5910 (jim_thompson5910):

make sure to check D as well

OpenStudy (anonymous):

Ok I will :)

OpenStudy (anonymous):

I'm still going with C :)

jimthompson5910 (jim_thompson5910):

C is correct, but it's always good to check since sometimes multiple answers are possible

OpenStudy (anonymous):

Thank you! Is it ok if I get help with another one?

jimthompson5910 (jim_thompson5910):

go ahead

OpenStudy (anonymous):

What would the graph of this look like?

OpenStudy (anonymous):

Did it not copy? Poop.

jimthompson5910 (jim_thompson5910):

nope

OpenStudy (anonymous):

|dw:1401649430322:dw|

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