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Nina [5.8K]
3 years ago
13

Derivative of Y=cos^2(3x)

Mathematics
1 answer:
Black_prince [1.1K]3 years ago
4 0
The derivative is -6sin(3x)
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Ana can finish a certain job in 10 hours. Together, Ana and Nina can finish the same job in 3 hours. How many hours can Nina fin
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Answer:   4.5 hours

<u>Step-by-step explanation:</u>

Ana: \dfrac{1}{10}\ \text{job per hour}\\\\Nina: \dfrac{1}{x}\ \text{job per hour}\\\\Together: \dfrac{1}{3}\ \text{job per hour}\\\\\\Ana + Nina = Together\\\dfrac{1}{10}\quad +\dfrac{1}{x}\quad =\quad \dfrac{1}{3}\\\\\\\dfrac{1}{10}(30x)+\dfrac{1}{x}(30x) =\dfrac{1}{3}(30x)\\\\\\\rightarrow\quad 3x+30=10x\\\\.\quad 3x+30=10x\\\underline{-3x\qquad \quad -3x\quad}\\.\qquad \quad 30=7x\\\\.\qquad \quad \dfrac{30}{7}=\dfrac{7x}{7}\\\\\\.\qquad \quad \dfrac{30}{7}=x

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2 years ago
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Step-by-step explanation:

6 0
3 years ago
Amy ran 3/4 a mile. Write the distance Amy ran as a decimal.
dem82 [27]
0.75 of a mile Amy ran
6 0
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The manager of a store increases the price of a popular product by 5%. Let y be the original price of the product. The new price
Sphinxa [80]

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5 0
2 years ago
The picture has the question.
Alekssandra [29.7K]

Answer: 180 tickets for $40

Step-by-step explanation:

    To answer this question, we need to find a pattern;

15 / 3 = 5

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-> If you divide, we find a pattern of the quotient with 5... 4... so we can assume the next is 3

    Using this pattern;

60 * 3 = 180 tickets for $40

8 0
1 year ago
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