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3 years ago

Which polynomial function has a leading coefficient of 2, root - 4 with multiplicity 3, and root 10 with multiplicity 1?

Mathematics

1 answer:

Arlecino [84]3 years ago

6 0

Answer:

second option

Step-by-step explanation:

Given x = a, x = b are roots of f(x) then the factors are

(x - a) and (x - b)

and f(x) is the product of the factors

f(x) = a(x - a)(x - b) ← where a is a multiplier

If the roots have multiplicity then the factor is repeated

x = a with multiplicity 2, then factors are (x - a) and (x - a)

Here a = 2

x = - 4 with multiplicity 3, thus factors (x + 4 ), (x + 4), (x + 4)

x = 10 with multiplicity 1 has factor (x - 10)

Thus the polynomial function is

f(x) = 2(x + 4)(x + 4)(x + 4)(x - 10)

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Assume the random variable X is normally distributed with mean mu equals 50 and standard deviation sigma equals 7. Compute the p

drek231 [11]

Answer:

The probability that X is less than 42 is 0.1271.

Step-by-step explanation:

The random variable X follows a Normal distribution.

The mean and standard deviation are:

E (X) = μ = 50.

SD (X) = σ = 7.

A normal distribution is continuous probability distribution.

The Normal probability distribution with mean µ and standard deviation σ is given by,

$f_{X}(\mu, \sigma)=\frac{1}{\sigma\sqrt{2\pi}}e^{-(x-\mu)^{2}/2\sigma^{2}};\ -\infty$

To compute the probability of a Normal random variable we first standardize the raw score.

The raw scores are standardized using the formula:

$z=\frac{x-\mu}{\sigma}$

These standardized scores are known as z-scores and they follow normal distribution with mean 0 and standard deviation 1.

Compute the probability of (X < 42) as follows:

$P(X$

*Use a z-table for the probability.

Thus, the probability that X is less than 42 is 0.1271.

The normal curve is shown below.

6 0

3 years ago

How do you solve 6) n2+7n+15=5 by factoring?

charle [14.2K]

First, you need to set the equation equal to zero:

n^2 + 7n + 10 = 0

Now we factor. We need to find two numbers that add up to 7 and multiply to 10.

2 + 5 = 7
2 * 5 = 10

Now, we just need to write this as a polynomial:

(n + 2) (n + 5)
is our answer.

Hope this helps!

8 0

3 years ago

PLEASE HELP! 35 POINTS

nignag [31]

no solution, they are all the same line

4 0

3 years ago

Sam decides to build a square garden. If the area of the garden is 25x2 + 30x + 9 square feet, what is the length of one side of

seropon [69]

The correct answer is C. (5x+3) feet, and here is how I got it.
This is the equation you need to use:
(a+b)^2 = (a+b) (a+b)
So, let us plug in 5x and 3 here:
(5x+3)^2 = (5x+3)(5x+3) = 25x^2 + 15x + 15x + 9 = 25x^2 + 30x + 9 which is the area of the garden.

5 0

3 years ago

Complete the equivalent fraction in higher term: 3/4 = /12

Bogdan [553]

An equivalent fraction in higher terms is 9/12 because you must multiply the top by 3 because you multiplied the bottom by 3

3 0

3 years ago

Read 2 more answers