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Gala2k [10]
2 years ago
12

Is x + 3 a factor of the polynomial 2x^3 + 5x - 3?

Mathematics
1 answer:
Lapatulllka [165]2 years ago
5 0

Answer: n = - 6

Step-by-step explanation:

Given (x + h) is a factor of a polynomial f(x) then f(- h) = 0

Here

f(x) = x³ + 2x² - 5x + n and (x + 3) is a factor then f(- 3) = 0 , that is

f(- 3) = (- 3)³ + 2(- 3)² - 5(- 3) + n = 0 , so

- 27 + 2(9) + 15 + n = 0

- 27 + 18 + 15 + n = 0

6 + n = 0 ( subtract 6 from both sides )

n = - 6

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Elina [12.6K]

Answer:

(-2,3)

Step-by-step explanation:

The point where two lines cross should be your answer!!!

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6 0
2 years ago
The mean GPA for 127 residents of the local apartment complex is 1.6. What is the best point estimate for the mean GPA for all r
madam [21]

By the Central Limit Theorem, the best point estimate for the mean GPA for all residents of the local apartment complex is 1.7.

The Central Limit Theorem established that, for a normally distributed random variable X, with mean and standard deviation, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean  and standard deviation ;

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

The sample of 112 residents has a mean GPA of 1.7.

By the Central Limit Theorem, the best point estimate for the mean GPA for all residents of the local apartment complex is 1.7.

Learn more about Mean:

brainly.com/question/4313883

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4 0
2 years ago
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Makovka662 [10]

Answer:

It's just like reflection

Step-by-step explanation:

8 0
3 years ago
When are x+3 and 3+x equal? When are they not equal?
Vlad1618 [11]

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when x is any real number

Step-by-step explanation:

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Answer:

rational

Step-by-step explanation:

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