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Mekhanik [1.2K]
3 years ago
15

What does this mean help

Mathematics
2 answers:
Ksenya-84 [330]3 years ago
4 0

Answer:

where is the question.??? ¿¿¿

xxMikexx [17]3 years ago
4 0

Answer:

where is the question????

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Find 10.8 – 20.2 + 11 – (- 38.5)
Mrrafil [7]

Answer:

Step-by-step explanation:

P

E

M

D

A

S

10.8 – 20.2 + 11 – (- 38.5)

10.8 – 31.2 – (- 38.5)

10.8 – 7.3

3.5

4 0
3 years ago
Using the law of cosines, a=2.2
Shkiper50 [21]
Answer: 81°


Explanation:


1) Law of cosines:


In a triangle with sides a, b, c whose opposite angles are, respectively, A, B and C, the law of cosines states:


b² = a² + c² - 2 (a)(c) cos (B)


2) In the triangle of the figure you have


b = 4.0
B = ?
a = 2.2
c = 3.7

⇒ (4.0)² = (2.2)² + (3.7)² - 2 (2.2) (3.7) cos(B)

⇒ 16 = 4.84 + 13.69 - 16.28cos(B)

⇒ 16.28 cos(B) = 4.84 + 13.69 - 16 = 2.53

⇒ cos(B) = 2.53 / 16.28

⇒ X = arccos(2.53 / 16.28 ) = 81.06° ≈ 81°


7 0
4 years ago
A deck of cards contains 30 cards with labels 1, 2, . . . , 30. Suppose that somebody is randomly dealt a set of 7 cards of thes
____ [38]

\displaystyle |\Omega|=\binom{30}{7}=\dfrac{30!}{7!23!}=\dfrac{24\cdot25\cdot\ldots\cdot30}{2\cdot3\cdot\ldots\cdot 7}=2035800

a)

\displaystyle\\|A|=\binom{15}{3}\cdot \binom{15}{4}=\dfrac{15!}{3!12!}\cdot\dfrac{15!}{4!11!}=\dfrac{13\cdot14\cdot15}{2\cdot3}\cdot\dfrac{12\cdot13\cdot14\cdot15}{2\cdot3\cdot4}=13\cdot7\cdot5\cdot13\cdot7\cdot15=621075\\\\P(A)=\dfrac{621075}{2035800}=\dfrac{637}{2088}\approx30.5\%

b)

\displaystyle\\|A|=\binom{10}{7}\cdot 3^7=\dfrac{10!}{7!3!}\cdot2187=\dfrac{8\cdot9\cdot10}{2\cdot3}\cdot2187=4\cdot3\cdot10\cdot2187=262440\\\\P(A)=\dfrac{262440}{2035800}=\dfrac{243}{1885}\approx12.9\%

4 0
2 years ago
A survey of statistics students asked the students for their favorite ice cream. The results of the
Elenna [48]

Answer:

Vanilla

Step-by-step explanation:

Let us first know the definition of modal class to find the modal class distribution.

Modal class is the class which occurs maximum number of times (or) the highest frequency in the data.

In the given data, The highest frequency occurred is 24, which is for the flavour Vanilla.

That is vanilla flavour is liked by most of the students.

So, Modal class for the given data is vanilla.

3 0
3 years ago
Eric bought a rectangular piece of cardboard with area 150 square inches to prepare a chart. Later, Eric’s teacher suggested tha
telo118 [61]

Answer:

C. 600

Step-by-step explanation:

Prime Example[s]:

2[1]2[150] → [2][300] >> 600

2[5]2[30] → [10][60] >> 600

I am joyous to assist you anytime.

3 0
3 years ago
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