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Mathematics 22 Online
OpenStudy (anonymous):

help plz

OpenStudy (anonymous):

OpenStudy (michele_laino):

yes! I confirm that's right!

OpenStudy (anonymous):

thanks can you help me with more

OpenStudy (michele_laino):

ok!

OpenStudy (anonymous):

OpenStudy (michele_laino):

here, the last option is correct, whereas the second option is wrong. Please you have to search for the system which contains two equal equations

OpenStudy (anonymous):

what about a and c

OpenStudy (anonymous):

OpenStudy (michele_laino):

option a) is correct, also option d) is correct as I wrote before option c) is wrong, since such system is composed by two different equations

OpenStudy (michele_laino):

the two equations are equivalent, namely the have the same solutions. If I divide both sides of the first equation by 2, I get: \[\frac{{6x + 4y}}{2} = \frac{2}{2} \Rightarrow 3x + 2y = 1\] namely I get the second equation

OpenStudy (michele_laino):

so, what is the right option?

OpenStudy (michele_laino):

hint: we can speak about coincident equations

OpenStudy (anonymous):

c

OpenStudy (michele_laino):

that's right!

OpenStudy (anonymous):

OpenStudy (michele_laino):

here, as we can see, from the graph, we have one solution, furthermore the equations of the system are not coincident, so, you are right!

OpenStudy (anonymous):

:)

OpenStudy (michele_laino):

:)

OpenStudy (anonymous):

OpenStudy (michele_laino):

yes! I confirm the second option

OpenStudy (michele_laino):

namely, second option is the correct option

OpenStudy (anonymous):

OpenStudy (michele_laino):

yes! That's right!

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