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wel
2 years ago
13

2. Find the length of AD if the length of AB is

Mathematics
1 answer:
vlabodo [156]2 years ago
5 0

Step-by-step explanation:

can you please show the picture too

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<span>Pneumonoultramicroscopicsilicovolcanoconiosis has 45 letters.</span>
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2 years ago
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The length of ZX is 2 units.<br><br><br>What is the perimeter of triangle XYZ?
Alika [10]

Answer:

5+3 square root of 5 units

7 0
2 years ago
Eights rooks are placed randomly on a chess board. What is the probability that none of the rooks can capture any of the other r
erastova [34]

Answer:

The probability is \frac{56!}{64!}

Step-by-step explanation:

We can divide the amount of favourable cases by the total amount of cases.

The total amount of cases is the total amount of ways to put 8 rooks on a chessboard. Since a chessboard has 64 squares, this number is the combinatorial number of 64 with 8, 64 \choose 8 .

For a favourable case, you need one rook on each column, and for each column the correspondent rook should be in a diferent row than the rest of the rooks. A favourable case can be represented by a bijective function  f : A \rightarrow A , with A = {1,2,3,4,5,6,7,8}. f(i) = j represents that the rook located in the column i is located in the row j.

Thus, the total of favourable cases is equal to the total amount of bijective functions between a set of 8 elements. This amount is 8!, because we have 8 possibilities for the first column, 7 for the second one, 6 on the third one, and so on.

We can conclude that the probability for 8 rooks not being able to capture themselves is

\frac{8!}{64 \choose 8} = \frac{8!}{\frac{64!}{8!56!}} = \frac{56!}{64!}

7 0
2 years ago
Pls help asap! It’s due in one hour!!
AfilCa [17]
1. t = 7
2. t = 0
i think? although I’m not 100% sure
8 0
2 years ago
Density of a 8200 gram brick that is 4 inches x 4 inches x 4 inches?
Tanzania [10]
Density = mass / volume
Density = 8,200 grams / (4*4*4)
Density = 8,200 grams / 64 cubic inches
Density = <span> <span> <span> 128.125 </span> </span> </span> grams / cubic inch


3 0
3 years ago
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