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4 years ago

If x3=-27 then what is x?

Mathematics

2 answers:

Rasek [7]4 years ago

5 0

The answer would be 9! 3 x 9 = 27.

Lina20 [59]4 years ago

5 0

Cube root both x cubed and - 27

X cubed cubed root = x
-27 cubed root = -3
(because -3 x -3 x -3 = -27)

x = -3 is your answer

Hope this helps

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2 years ago

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tangare [24]

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3 years ago

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3 years ago

4(x+9)=8x-7<br> Solve for x

valentina_108 [34]

Answer:

x = 10.75

Step-by-step explanation:

4(x+9)=8x-7

Step 1: Distribute the 4 to the x and 9

4 * x = 4x

4 * 9 = 36

We now have 4x + 36 = 8x - 7

Step 2: add 7 to both sides

36 + 7 = 43

-7 + 7 cancels out

We now have 4x + 43 = 8x

Step 3 subtract 4x from both sides

4x - 4x cancels out

8x - 4x = 4x

We now have 4x = 43

step 4 divide both sides by 4

4x / 4 ( the 4s cancel out and we're left with x )

43/4 = 10.75

We're left with x = 10.75

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