Ask question

Ask question

All categories

3 years ago

7

Solve for the roots in the equation below. In your final answer, include each of the necessary steps and calculations. Hint: Use

your knowledge of polynomial division and the quadratic formula.
x3 - 27 = 0

1 answer:

AveGali [126]3 years ago

6 0

Answer: 3

<u>Step-by-step explanation:</u>

$x^3-27=0\\\\x^3=27\\\\\sqrt[3]{x^3}=\sqrt[3]{27}\\\\x=\sqrt[3]{3\cdot 3\cdot 3} \\\\x=3$

You might be interested in

To create a confidence interval from a bootstrap distribution using percentiles, we keep the middle values and chop off a certai

Nataliya [291]

Answer:

a

$\frac{\alpha }{2} = 2.5 \%$

b

$N = 25$

Step-by-step explanation:

From the question we are told that

The number of bootstrap samples is n = 1000

From the question we are told the confidence level is 95% , hence the level of significance is

$\alpha = (100 - 95 ) \%$

=> $\alpha = 0.05$

Generally the percentage of values that must be chopped off from each tail for a 95% confidence interval is mathematically evaluated as

$\frac{\alpha }{2} = \frac{0.05}{2} = 0.025 = 2.5 \%$

=> $\frac{\alpha }{2} = 2.5 \%$

Generally the number of the bootstrap sample that must be chopped off to produce a 95% confidence interval is

$N = 1000 * \frac{\alpha }{2}$

=> $N = 1000 * 0.025$

=> $N = 25$

4 0

4 years ago

What is the square root of 25?

jolli1 [7]

Answer:

It would be 5.

8 0

3 years ago

Read 2 more answers

one positive number is 28 less than another number. if the reciprocal of the smaller number is added to four times the reciproca

marishachu [46]

Let x represent the larger number.
1/(x -28) +4/x = 1/6
Multiplying by the product of denominators, we have
6x +24(x -28) = x(x -28)
In standard form, this is
x^2 -58x +672 = 0
(x -42)(x -16) = 0

The two numbers are (-12 and 16) or (14 and 42).

7 0

4 years ago

How do I find the area of these

bija089 [108]

Answer:

Step-by-step explanation:

8 0

4 years ago

What is -4^2 equal to?

Anni [7]

Answer:

-16

Step-by-step explanation:

Negative four to the second power is equal to -4 x -4 which is -16

6 0

3 years ago