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Mathematics 22 Online
OpenStudy (anonymous):

Which point lies in the solution set for the following system of inequalities? y < 2x + 4 y < -2x + 2

OpenStudy (mertsj):

(0,0)

OpenStudy (anonymous):

These are the answers (1, 0) (-5, -2) (0, -3) (-1, 5)

OpenStudy (mertsj):

Well plug each point into both inequalities and find which are true.

OpenStudy (mertsj):

0<2(1)+4 0<6 T 0<-2(1)+2 0<0 F

OpenStudy (mertsj):

Try the next point. -2<2(-5)+4 -2<-6 F Try the next pair.

OpenStudy (mertsj):

-3<2(0)+4 -3<4 T -3<-2(0)+2 -3<2 T

OpenStudy (mertsj):

Choose that one. It makes both sentences true.

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