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Mathematics 22 Online
OpenStudy (anonymous):

The graph below represents which system of inequalities? *Graph is attached*

OpenStudy (anonymous):

OpenStudy (anonymous):

It sounds like you are taking a quiz.

OpenStudy (anonymous):

no just homework

OpenStudy (reemii):

you have given no systems, how do we choose?

OpenStudy (anonymous):

A. y less than or equal to -2x + 3 y less than or equal to x + 3 B. y greater than or equal to -2x + 3 y greater than or equal to x + 3 C. y less than or equal to -3x + 2 y less than or equal to -x + 2 D. y > -2x + 3 y > x + 3

OpenStudy (anonymous):

Well can you narrow down your choices since the lines are solid?

OpenStudy (anonymous):

I guess it wouldnt be A or C

OpenStudy (anonymous):

What do the solid lines mean?

OpenStudy (anonymous):

i dont understand

OpenStudy (anonymous):

Ok solid lines mean one thing and dashed lines mean another. What it is the difference?

OpenStudy (reemii):

the convention is to use solid (not dotted) lines when the border of the region is included in the solution, it correspond to \(\le\) or \(\ge\); and dotted lines when it is \(<\) or \(>\). Since the lines on the graph are solid, you can reject D.

OpenStudy (anonymous):

ok thanks reemii I guess I'll let you take over from here, boss.

OpenStudy (anonymous):

@reemii

OpenStudy (anonymous):

Ok d is out now what

OpenStudy (reemii):

@Paynesdad ok Find the equation of the lines that are on your graph. Both lines are going through the point (0,2). An equality can give you the equation of a line if you replace \(\le\) or \(\ge\) with =. If a line in a system does not contain the point (0,2), you can reject the whole system. test equations given by A's inequalities. "y = -2x+3" does not contain (0,2) because 2 = -2.0 + 3 is not true. -> reject A. test B, and test C. you will see that you have to reject B and that C is ok.

OpenStudy (anonymous):

My toes hurt from being stepped on!

OpenStudy (anonymous):

Thank you so much @reemii thats what i needed an explination then answer thank you again

OpenStudy (reemii):

yw @shannon342 @Paynesdad ?

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