3 years ago

Cos 4A - cos 4B = 8(cos A - cos B) (cos A +cos B) (cos A - sin B) (cos A + sin B)

Mathematics

1 answer:

sveta [45]3 years ago

3 0

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Answer:

2, 4, 10 or 20 students

Step-by-step explanation:

<u>Prime factors:</u>

20 = 2*2*5
40 = 2*2*2*5

<u>Common factors of the two numbers: </u>

2, 4, 10, 20

Possible number of students as above

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3 years ago

5 out of nine students in the sophomore class in musicians if there are 450 students in the sophomore class for many of them are

Anarel [89]

Answer:

250 Students are musicians, 200 are not.

Step-by-step explanation:

Decimal Version:

If we take "5 out of every nine students are musicians" and make this a fraction we get 5/9. 5/9 as a decimal is approximately 55.555555555556. 55.555555555556% of 450 = 250. So that means 250 students are musicians.

Fraction Version : See attached image.

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3 years ago

Find the distance between the points. Give an exact answer

never [62]

Answer: $2\sqrt{10} \approx 6.325$

Step-by-step explanation:

$\sqrt{(-9-(-11))^2 +(-3-(-9))^2}=2\sqrt{10} \approx 6.325$

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1 year ago

Can somebody help me with this math question, all you have to do is answer the equation, then it's described, and then it draw i

natali 33 [55]

Answer:

X= - 2

Step-by-step explanation:

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Remove the parentheses

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Collect the like terms

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Move the variable to the left-hand side and change its sign

18x+6x=6+18

Collect the like terms

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