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3 years ago

Please help me idk this

Mathematics

2 answers:

Charra [1.4K]3 years ago

6 0

Answer:

0.7

Step-by-step explanation:

The answer is <em>0.7</em><em> </em>

Sorry if I'm wrong :(

love history [14]3 years ago

3 0

Answer:

The answer would be 0.7

Step-by-step explanation:

cause when rounding 5+ you round to the next number 4- you keep the number the same and the tenths place will be right after the decimal point

I am joyous to assist anyone at anytime :)

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Which linear equation represents a non-proportional relationship? A) y = 1.5x B) y = x + 3 C) y = 4 5 x D) y = −3x

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B. because all others can be turned into fractions. Just find the odd one out also.

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F(x)=8x2+x−9 and g(x)=5x2, find (f+g)(x) and (f+g)(−3).

inessss [21]

Answer:

105

Step-by-step explanation:

f(x) = 8x² + x -9

g(x) =5x²

(f+g)(x) = 8x² + x - 9 + 5x²

Collect like terms

8x² +5x² + x - 9

13x² + x - 9

b) (f+g)(-3) = 13x² + x - 9 when x =-3

= 13×-3² + (-3) - 9

= (13×9) -3 -9

= 117 -3 -9

= 105

I hope this was helpful, please mark as brainliest

7 0

3 years ago

According to a study done by a university student, the probability a randomly selected individual will not cover his or her mou

Sergio [31]

Using the binomial distribution, it is found that:

a) There is a 0.1618 = 16.18% probability that among 18 randomly observed individuals exactly 6 do not cover their mouth when sneezing.

b) There is a 0.104 = 10.4% probability that among 18 randomly observed individuals fewer than 3 do not cover their mouth when sneezing.

c) 9 is more than 2.5 standard deviations below the mean, hence it would not be surprising if fewer than half covered their mouth when sneezing.

<h3>What is the binomial distribution formula?</h3>

The formula is:

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

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

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.

The values of the parameters are given as follows:

n = 18, p = 0.267.

Item a:

The probability is P(X = 6), hence:

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

$P(X = 6) = C_{18,6}.(0.267)^{6}.(0.733)^{12} = 0.1618$

There is a 0.1618 = 16.18% probability that among 18 randomly observed individuals exactly 6 do not cover their mouth when sneezing.

Item b:

The probability is:

P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2).

Then:

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

$P(X = 0) = C_{18,0}.(0.267)^{0}.(0.733)^{18} = 0.0037$

$P(X = 1) = C_{18,1}.(0.267)^{1}.(0.733)^{17} = 0.0245$

$P(X = 2) = C_{18,2}.(0.267)^{2}.(0.733)^{16} = 0.0758$

P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2) = 0.0037 + 0.0245 + 0.0758 = 0.104.

There is a 0.104 = 10.4% probability that among 18 randomly observed individuals fewer than 3 do not cover their mouth when sneezing.

item c:

We have to look at the mean and the standard deviation, given, respectively, by:

E(X) = np = 18 x 0.267 = 4.81.

$\sqrt{V(X)} = \sqrt{18(0.267)(0.733)} = 1.88$

9 is more than 2.5 standard deviations below the mean, hence it would not be surprising if fewer than half covered their mouth when sneezing.

More can be learned about the binomial distribution at brainly.com/question/24863377

#SPJ1

6 0

2 years ago