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Jet001 [13]
3 years ago
14

One of the factors of x³ - 27 is x - 3. What is the other factor?

Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
6 0

Answer:

We know that, a³ - b³ = (a - b)(a² + ab + b²)

Now,

  • x³ - 27
  • (x)³ - (3)³
  • (x - 3)(x² + 3x + 9)

Therefore,

  • <u>(x² + 3x + 9)</u> is the other factor.
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Ten runners join a race. In how many possible ways can they be arranged as first, second, and third placer? Pls answer
Daniel [21]
Ans: 720

<span>This is equal to the number of different arrangements of three persons from a group of 10 persons </span>

Required number of ways = 10P3 = 720

OR can be solved in this way
select 3 runners (10C3 ways)
These 3 runners can be arranged in 3! ways
<span>Total = 10C3×3! = 720

</span>
5 0
3 years ago
Read 2 more answers
I need a bit help im new to this math stuff
kompoz [17]

Answer:

I think it is the 3rd one

3 0
3 years ago
Figure lmno is a parrellelogram<br> The sum of measures of angles l and m is
snow_tiger [21]

Answer:

l+m = 180°{being co-interior angle}

Step-by-step explanation:

7 0
3 years ago
The Area of a square at right is 72 square units Find the value of X, <br>Did I do this right?
Assoli18 [71]
Yes, your work is correct.

The diagram does illustrate x²+6x+9=72.  This is also represented by

(x+3)² = 72

We can take the square root of both sides:
\sqrt{(x+3)^2}=\sqrt{72}&#10;\\&#10;\\x+3=\pm 6 \sqrt2&#10;\\&#10;\\x+3-3=\pm 6 \sqrt{2} -3&#10;\\&#10;\\x=-3\pm 6\sqrt{2}

When we evaluate this, the answers are x = -11.5 or x = 5.5.
5 0
3 years ago
Could you please find what x=<br><br><br><br>thank you
pickupchik [31]
4x-1=9x-2
Add 1 to both sides
4x= 9x-1
Subtract 9x from both sides
-5x=-1
Divide both sides by -5
X=-1/-5
6 0
3 years ago
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