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OLga [1]
3 years ago
11

1.)What is the only solution of 2x^2 + 8x = x^2 – 16?

Mathematics
2 answers:
Greeley [361]3 years ago
8 0
If you would like to solve the equation 2 * x^2 + 8 * x = x^2 - 16, you can calculate this using the following steps:

<span>2 * x^2 + 8 * x = x^2 - 16
</span><span>2 * x^2 - x^2 + 8 * x + 16 = 0
</span>x^2 + 8 * x + 16 = 0
(x + 4) * (x + 4) = 0
x = - 4

<span>The correct result would be x = - 4.</span>
pogonyaev3 years ago
6 0

Answer:

x= -4

Step-by-step explanation:

took the test:)

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Allison is 5 ft tall. One afternoon her shadow measured 2.5 ft. At the same time, the shadow of her favorite tree was 14.5 ft. W
luda_lava [24]
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5 / 2.5 = T / 14.5
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8 0
3 years ago
My friend needs help explaining this and I don't know anything.
DIA [1.3K]

To solve this equation (correct me if i'm wrong), you could first multiply the bottom equation by 3, to get 15y. After that, we get -4x-15y=-17 and -3x + 15y=-39, and if we add the 2 equations up, on top of each other, we get -7x=-56, and we can conclude that x=8, and with substitution (-32 - 15y = -17), we know that y=(-1)


Here's what I mean by on-top


-4x-15y=-17

-3x + 15y=-39


-7x=-56

7 0
3 years ago
What does per gallon mean is it division or multiplication??
DerKrebs [107]
Per gallon means you multiply for each gallon.

Please mark brainliest answer :^)
7 0
3 years ago
Read 2 more answers
Hi Math Geniuses! Could you answer this for me please? Thx!
qwelly [4]

Answer:

1586cm

Step-by-step explanation:

The answer is 1586cm because.....

  • Step one, we have two shapes here we need to figure out the volume of the smaller rectangle. so we have the width of 6 the height of 2 and now we need to find the length of the smaller rectangle. To do so it is the same length as the other rectangle so we will replace the missing length with 13 cm since that is what  its length is. Now we multiply 6x2x13=156cm
  • Step two now we find the Volume of the bigger rectangle. Since we have all of the sides, this part will be easy peasy. Multiply 5x13x22 to get 1430.
  • Final step is add the two volumes together to get the total volume of this shape. Which is 1586 cm^2
  • Hope i helped :)
3 0
3 years ago
Read 2 more answers
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