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stira [4]
3 years ago
7

In how many ways can the eight rooks be placed on an 8-by-8 chessboard so that no two rooks can attack one another?

Mathematics
1 answer:
saul85 [17]3 years ago
7 0
You have a total of (8!)^2/8! and that gets you. 40,320
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A basketball player made 17 out of 20 free throws at a practice. What percent of the free throws did the player miss?
s2008m [1.1K]

Answer:

he missed 97%

Step-by-step explanation:

subtract 17-20 to get 3 and subtract 3 from 100% to get 97%, then multiply 97 by 3

3 0
2 years ago
How can you find the area of a two-dimensional composite figure, or the surface area of a three-dimensional composite figure?
goldenfox [79]

Step-by-step explanation:

<u>a. the area of a two-dimensional composite figure</u>

In this situation, we need to draw any necessary segments to view the figure as basic shapes, then:

  • Step 1: add basic shape areas belonging to the composite shape
  • Step 2: subtract basic shape areas NOT belonging to the composite shape

<u>b. the surface area of a three-dimensional composite figure</u>

As we know (3D) composite objects are made of two or more objects put together. To find the surface area of a 3D composite object, we need:

  • Step 1:  find the outside surface area of each object
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Hope it will find you well

8 0
3 years ago
Solve.
Serggg [28]

Answer:

The solution is (4, 0)

Step-by-step explanation:

Using Linear combination method to solve:

2d + e = 8\\d - e = 4\\

Since "e" have the same coefficient in both equation with opposite operator; we will add.

(2d + d) + (e - e) = (8 + 4)\\3d = 12\\

Divide both side by coefficient of d which is 3

\frac{3d}{3}  = \frac{12}{3} \\d = 4\\

Since d = 4; put 'd' into any of the equation to get 'e'

2d + e = 8\\2(4) + e = 8\\8 + e = 8\\e = 8 - 8\\e = 0\\

Therefore, the solution is (4, 0)

5 0
3 years ago
Lee spent 1/3 of his money on a jacket then he spent 1/4 of he remainder on a skirt how much did his spend on the skirt and how
serg [7]
How is it possible to know how much he started with? Or is it not asking for an exact amount?
6 0
2 years ago
What value of x makes this equation true <br> x/3 - 3 = x/9 + 3
Radda [10]

Answer:

27, you need to simplify both sides of the equation to get x on one side.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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