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kvasek [131]
2 years ago
6

Esme says the two expressions 4x - 5.2y + 6y + 7.9x - 8x and 19.9x + 11.2y are equivalent. Is she correct? Explain how you know.

If she is incorrect, provide the correct response in standard form.
Mathematics
1 answer:
Ipatiy [6.2K]2 years ago
7 0

Answer:

No, she's incorrect. 4x - 5.2y + 6y + 7.9x - 8x = 3.9x + 0.8y

Step-by-step explanation:

To find out if Esme is correct, we have to group the like terms and simplify.

  • (4x+7.9x-8x) + (-5.2y+6y)
  • 3.9x+0.8y

As you can see, 3.9x + 0.8y is the correct simplified expression, thus making Esme incorrect.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

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Answer:

x=3/4,y=5/2

Step-by-step explanation:

y=-x^2+4,y=2x+1

substitute y=-x^2+4 as y  for y=2x+1

2x+1=-x^2+4, x=3/4(isolate "x")

x=3/4

substitute x=3/4 for 2x+1=-x^2+4

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y=5/2

x=3/4, y=5/2

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Step-by-step explanation:

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Answer:

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