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Mathematics 8 Online
zarkam21:

Help

zarkam21:

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zarkam21:

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Vocaloid:

A) notice how you have -4y and +4y you can add the two equations together to eliminate y what do you get when you add the equations together?

zarkam21:

-11/3 and 7/2 for the answers 10+4y=24 +-6x-4y=8 10-6x=32

Vocaloid:

it's 10x not 10 check your calculations again

zarkam21:

-11/3 and 7/2 for the answers 10x+4y=24 +-6x-4y=8 4x=32 x=8

Vocaloid:

x = 8 (the solutions -11/3 and 7/2 are not correct though) use this x value to calculate the y-value by plugging it into one of the original equations

zarkam21:

10x+4y=24 10(8)+4y=24 80+4y=24 -80+4y=-56 4y=-56 y=-14

Vocaloid:

awesome so for part I) x = 8 and part II) y = -14 and the coordinate is (8,-14) for part III) just graph the two original equations (unfortunately you might have decimal intercepts/slopes)

zarkam21:

So the two questions they gave that is what I graph>

zarkam21:

equations*

Vocaloid:

yes

zarkam21:

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zarkam21:

Sorry took me a little bit

Vocaloid:

keep in mind the solution is still (8,-14) so that's the point where your graphs should intersect so it's a little off

zarkam21:

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Vocaloid:

still off the intersection should be (8,-14)

zarkam21:

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zarkam21:

got it now

Vocaloid:

good, then for part IV it's just asking about the intersection which is (8,-14) as we expect

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