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3 years ago

Find all the zeros of the polynomial H(x)=x(x^2-5x+6)

Mathematics

1 answer:

Whitepunk [10]3 years ago

6 0

$x(x^2-5x+6)=x(x-2)(x-3)=0\implies x=0,2,3$

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Where is 9x<36 on a number line plz help I am really confused????

jarptica [38.1K]

Answer:

its arung the middle or to thr right

Step-by-step explanation:

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3 years ago

A test has 20 true/false questions. What is the probability that a student passes the test if they guess the answers? Passing me

Minchanka [31]

Using the binomial distribution, it is found that:

The probability that the student will get 15 correct questions in this test by guessing is 0.0207 = 2.07%.

For each question, there are only two possible outcomes, either the guess is correct, or it is not. The guess on a question is independent of any other question, hence, the binomial distribution is used to solve this question.

Binomial probability distribution

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$C_{n,x} = \frac{n!}{x!(n-x)!}$

The parameters are:

x is the number of successes.

n is the number of trials.

p is the probability of a success on a single trial.

In this problem:

There are 20 questions, hence $n = 20$ .

Each question has 2 options, one of which is correct, hence $p = \frac{1}{2} = 0.5$

The probability is:

$P(X \geq 15) = P(X = 15) + P(X = 16) + P(X = 17) + P(X = 18) + P(X = 19) + P(X = 20)$

In which:

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 15) = C_{20,15}.(0.5)^{15}.(0.5)^{5} = 0.0148$

$P(X = 16) = C_{20,16}.(0.5)^{16}.(0.5)^{4} = 0.0046$

$P(X = 17) = C_{20,17}.(0.5)^{17}.(0.5)^{3} = 0.0011$

$P(X = 18) = C_{20,18}.(0.5)^{18}.(0.5)^{2} = 0.0002$

$P(X = 16) = C_{20,19}.(0.5)^{19}.(0.5)^{1} = 0$

$P(X = 17) = C_{20,20}.(0.5)^{20}.(0.5)^{0} = 0$

Then:

$P(X \geq 15) = P(X = 15) + P(X = 16) + P(X = 17) + P(X = 18) + P(X = 19) + P(X = 20) = 0.0148 + 0.0046 + 0.0011 + 0.0002 + 0 + 0 = 0.0207$

The probability that the student will get 15 correct questions in this test by guessing is 0.0207 = 2.07%.

You can learn more about the binomial distribution at brainly.com/question/24863377

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3 years ago

12−x2y if x=−7 and y=2

Taya2010 [7]

Answer:

the answer is 16 im pretty sure

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2 years ago

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HELP AGAIN PLS SIR/MA AM/ IT

satela [25.4K]

Answer:

320 Grams of Insects

Step-by-step explanation:

8 Bats = 40 grams

I divided the grams between the bats, so:

40 ÷ 8 = 5

Then Multiplied 5 by 64, which equals 320 grams total for 64 bats.

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3 years ago

Corey has 16 cups of flour to make cookies. One batch of cookies takes 2 1/2 cups of flour. If he must save 6 cups of flour for

alexira [117]

16 - 6 = 10
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3 years ago

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