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vivado [14]
3 years ago
14

There are 20 entries in the chess tournament. How many ways can they finish in first, second,

Mathematics
1 answer:
Romashka [77]3 years ago
3 0

Answer:

6840

Step-by-step explanation:

Here, the order matters (1st, 2nd, and 3rd), so we need to use permutations.

There are 20 people who can get in first place.  After that, there are 19 people who can get in second place.  Finally, there are 18 people who can get in third place.  So:

20 * 19 * 18 = 6840

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PLEASE HELP!!!<br> Solve for X...<br> Cos30=x/8<br> Answer MUST be in radical form. NO DECIMALS.
Ivenika [448]

cos(30)=x/8

Rewrite the equation as

x/8=cos(30)

Multiply both sides of the equation by

8

.

8

⋅

x/8=8⋅cos(30)

Simplify both sides of the equation.

Tap for more steps...

x=4√3

The result can be shown in multiple forms.

Exact Form:

x=4√3

Decimal Form:

x=6.9282032

8 0
3 years ago
I need help now please
LekaFEV [45]

Answer:

12

Step-by-step explanation:

A = ½(b1 + b2)h

A = (3 + 5)(3)/2

A = 12

8 0
3 years ago
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What happens to the equation when y = x becomes y = -x?
notka56 [123]
Well -x is the opposite of x

so i think that it makes the lines perpendicular
7 0
3 years ago
What is the value of n?<br> Enter your answer in the box<br> 7 cm<br> 4 cm<br> 8 cm<br> n
Wittaler [7]

Answer:

n=14

Step-by-step explanation:

To find the length of the given side with length "n", we must know the relationship between the different sections when the chords cross one another.

Now, the relationship we require is that when we multiply the 2 parts of both chords together, it will be equal to the product of the two sides in the other chord. Thus;

7(8) = 4(n)

56 = 4n

14 = n

3 0
2 years ago
Yan is climbing down a ladder. Each time he descends 4 rungs on the ladder, he stops to see how much farther he has to go. If Ya
yarga [219]

Answer:

8+8+8+8

Step-by-step explanation:

it can't be any negatives because the questions asking how many ladder rungs he climed not how far he went down. It can't be the first one cause Yan did not climb 16 rungs.

3 0
3 years ago
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