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Lubov Fominskaja [6]
3 years ago
9

4x-5.2y + 6y + 7.9x - 8x

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
5 0

Answer:

3.9x + 0.8y

Step-by-step explanation:

this is your answer

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Answer: 5,835 gallons

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If x+2y=3 and xy=2 show that x³+8y³+9=0​
kicyunya [14]

Step-by-step explanation:

<u>Given</u>

  • x + 2y = 3 and xy = 2
  • show that x³ + 8y³ + 9 = 0​

<u>Solution in steps:</u>

  • (x + 2y)³ = 3³
  • x³ + 3x²(2y) + 3x(2y)² + (2y)³ = 27
  • x³ + 6x(xy) + 12y(xy) + 8y³ = 27
  • x³ + 8y³ + 6(x + 2y)xy = 27                    ⇒  Substitute values
  • x³ + 8y³ + 6*3*2 = 27
  • x³ + 8y³  + 36 - 27 = 0
  • x³ + 8y³  + 9 = 0

Done

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3 years ago
How can adding doubles help you multiply by 2? give an example
Anuta_ua [19.1K]
It helps you multiply by two by giving you the answer to the expression.
Example: 2•5=10/
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A sculptor has just finished creating a large wooden sphere for a sculpture he is working on. The sphere has a radius of 4.3 fee
Licemer1 [7]
Density = mass/volume

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the volume of a sphere is v = 4/3 πr^3

v = (4/3) (π) (4.3)^3
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the final density is 31.76!!
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Its 16/75 if its one of ur options hope it helps  
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