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dybincka [34]
3 years ago
14

Algebra 2.. Please help!

Mathematics
2 answers:
leva [86]3 years ago
7 0
Only C works because -168 +160 gives -8
Artist 52 [7]3 years ago
7 0
Given 
\left \{ {{2x-4y=24} \atop {-6x+20y=-8}} \right.,
we can use Gaussian elimination to find the point of intersection.

Let's find a term we want to cancel. We could either multiply the first equation by 3 to cancel the x-terms, or multiply by 5 to cancel the y-terms.

5(2x-4y=24) = 10x-20y=120


10x-20y=120 \\  \\ -6x+20y=-8 \\ \\ \\ 4x=112 \\ \\ x = 28

We have now solved for x, but we need to find y. We can substitute our value for x back into any of the two equations.

2(28)-4y=24  \\  \\ 56-4y=24  \\  \\ -4y=-32 \\  \\ y = 8

So, the point is (28, 8).

Answer choice C.

If your teacher doesn't require you to show your work (and this tip is especially useful for the SAT and ACT), you can save a lot of time by simply plugging-in the solutions from the answer choices to see which one works.
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Mamont248 [21]

Answer: 350,340,330,320,310,300,290,280,270,260,250,240.


Step-by-step explanation:

To solve this exercise you must keep on mind the following information:

1. By definition skip counting is about counting by a number which is not the number 1.

2. Skip counting by ten from 350 to 240 means that you need to subtract 10 to a number to find the other one.

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2 years ago
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finlep [7]

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7 0
2 years ago
Read 2 more answers
Please help don't answer just for points please'<br><br><br><br><br>Zoom in to see clearer :)​
Alex
I think it might be C but please wait for someone else to comment to confirm my answer :) have a beautiful day you are loved
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