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cupoosta [38]
2 years ago
6

Please answer this question...No spam​

Mathematics
1 answer:
mariarad [96]2 years ago
8 0

Answer:

  • (d) (x² + y² + z²)³ = 27x²y²z²

Step-by-step explanation:

<u>Use the identity:</u>

  • a³ + b³ + c³ = 3abc if a + b + c = 0

<u>Substitute as follows:</u>

  • a = x^{2/3}, b = y^{2/3}, c = z^{2/3}

<u>The sum of the cubes is:</u>

  • x² + y² + z² = 3(xyz)^{2/3}

<u>Cube both sides:</u>

  • (x² + y² + z²)³ = 27x²y²z²

Correct choice is (d)

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Out of all of these, C is the cheapest.

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3 years ago
Write 34 13/20 as a decimal please help!
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OlgaM077 [116]

Answer:

Kent is making a scale model of his favorite train. The actual train is 12 feet long and 4 feet wide. Kent wants his model to be 6 inches in length. Which would if he uses the same ratio?

Step-by-step explanation:

Kent is making a scale model of his favorite train. The actual train is 12 feet long and 4 feet wide. Kent wants his model to be 6 inches in length. Which would be the width if he uses the same ratio?

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3 years ago
HELPPPPPP MEEEEE<br><br> y=6x-1<br><br> and -2x-3y=-2 <br><br><br> USING SUBSTITUTION
bazaltina [42]
Answer:
 x = 4 
y =23 

work:
 plug in the value of Y to -2x-3y=-2. -2x - 3(<span>6x-1) = -2
 
multiply 3 and the numbers in parenthesis. -2x -18x - 3 =-2
combine like terms (-2x -18x). -20x - 3 = -2
subtract 3 from both sides to isolate the variable. -20x = -5 
divide to isolate the variable (-20/-5) x = 4
-
now that we know the value of x, it'll be easy to find Y.
Plug it in to the first equation.
</span><span>y=6(4)-1
</span>y = 24 - 1
y = 23

so x = 4 
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hope this helps! :D
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