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Anastaziya [24]
3 years ago
7

Katrina had a bookcase that holds 200 books. She can put 20 books on each shelf. If 20% of the bookcase is empty, how many shelv

es are filled with books
Mathematics
1 answer:
Tom [10]3 years ago
5 0

Answer:

First, find 20% of the 200 books. Then, subtract that amount by the total and divide that amount by 20 to receive your answer.

Step-by-step explanation:

20 x 200

/100  = 40

Therefore, there are 40 books missing.

200-40 = 160

160/20 = 8 shelves are filled with books.

There are 10 shelves in total: 160 books are on 8 shelves and 40 books are missing for 2 shelves

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Komok [63]

Answer:

40.56

Step-by-step explanation:

2pir

8÷2=r=4

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10+10+8+12.56=40.565

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3 years ago
Find derivative of y=(-3x^5+1)^3
sattari [20]

Use the chain rule:

\frac{\mathrm dy}{\mathrm dx}=3(-3x^5+1)^2\frac{\mathrm d[-3x^5+1]}{\mathrm dx}=3(-3x^5+1)^2(-15x^4)=\boxed{-45x^4(1-3x^5)^2}

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3 years ago
Suppose you have a right triangle with congruent legs and a hypotenuse that measure (12sqrt(5))/5 What is the length of the smal
anastassius [24]

The length of the smaller leg is 3.79

<h3>How to determine the length of the smaller leg?</h3>

Represent the smaller leg with x.

So, we have:

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This gives

2x^2 = 144/5

Divide by 2

x^2 = 72/5

This gives

x^2 = 14.4

Take the square root

x = 3.79

Hence, the length of the smaller leg is 3.79

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2 years ago
System of equations, special case infinitely many solutions?????
Mashcka [7]

One possible system is

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In other words, the second equation is the result of multiplying both sides of the first equation by 2.

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3 years ago
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kenny6666 [7]

Answer:

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Step-by-step explanation:

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|4.1 -(-4.7)|

|4.1 + 4.7|

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