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4 years ago

Hello!) this is math :( can you help me please?

Mathematics

1 answer:

strojnjashka [21]4 years ago

4 0

Answer:

Nine: 5, 7, 9, 11

Ten: 13, 17, 21, 25

Step-by-step explanation:

Nine

f(n) = 2n + 3

f(1) = 2*1 + 3 Substitute 1 for n

f(1) = 2 + 3 Multiply 2 * 1

f(1) = 5 Add 3

f(2) = 2n + 3 Substitute 2 for n

f(2) = 2*2 + 3 Combine the factors

f(2) = 4 + 3 Add the terms

f(2) = 7

f(3) = 9 Answer

f(4) = 11 Answer

Ten

f(n) = 4n + 9

f(1) = 4*1 + 9 Substitute 1 for n

f(1) = 4 + 9 Combine the factors

f(1) = 13 Add the terms

f(2) = 4*2 + 9 Substitute 2 for n

f(2) = 8 + 9 The factors (2 and 4) have been combined

f(2) = 17 Add 9

f(3) = 21 Answer

f(4) = 25 Answer

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Morgan writes the expression

DerKrebs [107]

He didn’t follow PEMDAS which is the an acronym for the order of operations. according to pemdas the first step is parenthesis (which is the p in pemdas) there fore the first step is to add the 1 and the 2
then since there are no exponents you multiply so you multiple 5(3) which is 15
then you can add all the number left to right
so 15+2+3= 20
so the answer is 20
hope this helped
let me know if you have any questions

5 0

4 years ago

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of

ludmilkaskok [199]

Answer:

The lower bound of the probability that there will be between 100 and 140 passengers 96%.

Step-by-step explanation:

The Chebyshev's theorem states that, the probability that X is within k standard deviation of mean is given by,

$P(|X-\mu|$

Here, k is any positive number.

The given information is:

Mean (µ) = 120

Standard deviation (σ) = 16.

Then, we need to compute, P (100 ≤ X ≤ 140).

Then,

$\frac{Upper-\mu}{\sigma}=\frac{140-120}{\sqrt{16}}=5$

$\frac{\mu-Lower}{\sigma}=\frac{120-100}{\sqrt{16}}=5$

Since, these two values coincide it implies that the event (66000, 78000) is centered about the mean.

Also, the event P (100 ≤ X ≤ 140) is equivalent to having X within 5 standard deviation of the mean.

That is, k = 5.

Then for k = 5,

$1-\frac{1}{k^{2}}=1-\frac{1}{25}=\frac{24}{25}=0.96$

That is, P (100 ≤ X ≤ 140) ≤ 0.96 .

Thus, the lower bound of the probability that there will be between 100 and 140 passengers 96%.

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3 years ago

Logan made a treasure map he treasure is 25 cm away from his location if each 1 cm on the scale drawing equals 5 m then how far

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Logan is 125 meters away from the treasure.

Also, this question seems like an elementary school question, not a high school question, so why does it say that you are in high school?

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4 years ago

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I've calculated that it is $632.66

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3 years ago

What is the range of f(x) = 3x + 9?

11Alexandr11 [23.1K]

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3 years ago