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alekssr [168]
3 years ago
14

There are 100 runners entered in a marathon. How many different groups of three runners can finish in first, second, and third?

Mathematics
1 answer:
DIA [1.3K]3 years ago
4 0
Permutations and Every runner except for the one that was 1st could be 2nd hoep this helps
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In a sample of 5000 flips of a fair coin, tails will always come up 2500 times.
rodikova [14]

true or false? no question?

if so

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3 years ago
Simplify.<br><br> 5x+3(x+2)+3<br><br><br> 6x + 8<br><br> 8x + 9<br><br> 8x + 5<br><br> 5x + 8
beks73 [17]

\\ \sf\longmapsto 5x+3(x+2)+3

\\ \sf\longmapsto 5x+3x+6+3

\\ \sf\longmapsto (5+3)x+9

\\ \sf\longmapsto 8x+9

7 0
2 years ago
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(-4/9)(-5/8) multiply
Setler79 [48]
Multiply numerators:
-4*-5=20

Multiply denominators:
9*8=72

20/72= 10/36
10/36= 5/18

Final answer: 5/18
8 0
2 years ago
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Koalas sleep for 20hours a day. For what fraction of a day do koalas sleep?
vagabundo [1.1K]

Answer:

5/6

Step-by-step explanation:

There are 24 hours a day and a koala sleeps for 20 hours of it:

20/24

5/6

5 0
2 years ago
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Nick has $40 and spends $1.50 each day. Bob has only $9 but he gets a daily allowance from which he saves $1.50 each day. In how
MrRa [10]
5 days nick will have 32.50 dollars and Bob will have 16.5.
After 10 days nick will have 25 dollars and Bob will have 24 dollars
On the 11th day Nick will have 23.50 dollars and Bob will have 25.5 dollars. 
It will take bob 11 days to have more money than nick. 
3 0
3 years ago
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