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Crank
3 years ago
15

So I need the answers ASAP 30 points and brainliest

Mathematics
2 answers:
Alenkasestr [34]3 years ago
8 0
So the first one would be 6/20 which reduces to 3/10. the second one is there are likely 80 black marbles.
shtirl [24]3 years ago
7 0

Answer:

okay so count how many beads there are in all then mak eitinto a fraction and then you will gte your answer

Step-by-step explanation:

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In how many ways can five indistinguishable rooks be placed on an 8-by-8 chess- board so that no rook can attack another and nei
german

The are 40320 ways in which the 5 indistinguishable rooks be can be placed on an 8-by-8 chess- board so that no rook can attack another and neither the first row nor the first column is empty

<h3 /><h3>What involves the rook polynomial? </h3>

The rook polynomial as a generalization of the rooks problem

Indeed, its result is that 8 non-attacking rooks can be arranged on an 8 × 8 chessboard in r8.

Hence, 8! = 40320 ways.

Therefore, there are 40320 ways in which the 5 indistinguishable rooks be can be placed on an 8-by-8 chess- board so that no rook can attack another and neither the first row nor the first column is empty.

Read more about rook polynomial

brainly.com/question/2833285

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5 0
2 years ago
I need help with 1 2 3
g100num [7]
D D B I think this should be right
7 0
3 years ago
Let f(x) = x2 +6x +8 . What is the domain of Kx)?
Vedmedyk [2.9K]

Answer:

The domain is all real numbers

Step-by-step explanation:

f(x) = x^2 +6x +8

The domain is what numbers can we put in for x

This is a parabola, we can put in any number for x and the function is defined

8 0
3 years ago
A baseball player hits a pop fly ball toward left field where it is caught by a player at a height of 5 feet. The ball was hit a
MakcuM [25]

Answer:

The range of the function are the values of height which are from 3, 4, 5, ..., 50

Step-by-step explanation:

The given parameters are;

The height at which the ball is caught = 5 feet

The height at which the ball was hit = 3 feet

The maximum height reached by the ball = 50 feet

The height of the ball given as a function of time is f(t) s = u·t - 1/2·g·t²

Where;

s = 50 feet

g = 9.81 m/s²

Therefore, we have;

50 = u·t - 1/2 × 9.81 × t²

50 = u·t - 4.905 × t²

Therefore, the range are obtainable values for f(t) which range from 3 to 50.

5 0
3 years ago
What is this plz answer
Anna11 [10]

25.2 \div 4 = 6.3
5.69 \div 7 = 0.813
22.5 \div 15 = 1.5
6 0
3 years ago
Read 2 more answers
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