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lesya [120]
3 years ago
14

Factorize (x-3y)^3+27y^3 With explanation Will mark Brainliest for the best one...

Mathematics
1 answer:
drek231 [11]3 years ago
7 0
Use the identity: a^3 + b^3 = (a + b)(a^2 - ab + b^2)
Replace b^3 by 27y^3
x^3 + 27b^3 = (x + 3y)(x^2 - 3xy + 9y^2)
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4 0
3 years ago
A 90% confidence interval for the average salary of all CEOs in the electronics industry was constructed using the results of a
Stella [2.4K]

Answer:

b) We are 90% confident that the mean salary of all CEOs in the electronics industry falls in the interval $139,048 to $154,144.

Step-by-step explanation:

Confidence interval:

Confidence level of x%

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Between a and b.

Intepretation: We are x% sure that the population mean is between a and b.

In this question:

90%

45 CEO's

Between ($139,048, $154,144).

So

We are 90% sure that the mean salary of all CEO's falls within this interval.

The correct answer is:

b) We are 90% confident that the mean salary of all CEOs in the electronics industry falls in the interval $139,048 to $154,144.

4 0
3 years ago
PLEASE ANSWER ALL BIG REWARD
sleet_krkn [62]

Answer:

  1. multiplying
  2. similar figures
  3. scale factor
  4. (x, y) (–3x, –3y) and (x, y) (0.23x, 0.23y)
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  6. Need diagram
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<em>good luck, i hope this helps :)</em>

6 0
3 years ago
For the experiment described, write the indicated event in set notation.
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Answer:

d. {(1,2),(2,2),(3,2),(4,2),(5,2),(6,2)}

Step-by-step explanation:

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7 0
3 years ago
A fine fabric was selling for $10.50 per half yard. Joni bought 2 1/3 yards. How much did he spend? Brainliest for correct answe
Alinara [238K]

Answer:

45.5

Step-by-step explanation:

First you would find 1/3 third of 10.50 and it is 3.5, you would then do 10.50 x 4 since it said 10.50 per half a yard, so you would do times 4 and you would get 42, you would then add 42 + 3.5 which equals 45.5.

8 0
3 years ago
Read 2 more answers
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