What system does it represent and what is the solution of this system

Mathematics

1 answer:

kicyunya [14]3 years ago

6 0

We can see that the lines intersect at (-5,3) on the graph, so that eliminates choices B and D. Both A and C say that the first line is y=x+8, which is true. A says that the second line is y+x=-2, and after isolating y, we get y=-x+2, which seems correct. Do the same for C, and you will find that it says the other equation is y=x-2, which is not true because it must have a negative slope. So your answer will be choice A.

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You can solve systems of equations using either substitution or elimination. For these problems, I recommend elimination. I'll do the first one as an example.

-3x + 16y = 9

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Multiply the second equation by -2.

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Add to the first equation (notice the y's cancel out).

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