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EleoNora [17]
2 years ago
7

How many permutations of a 7-digit phone number exist if any number 0-9 may be used but repetition is not allowed?

Mathematics
1 answer:
Blizzard [7]2 years ago
5 0

Answer:

10!/3!

Step-by-step explanation:

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3 years ago
Y=(3/5)x -3 and 5y =3x-10 these lines are and the second question?
azamat
Look at the first line:  y = (3/5)x - 3.  What happens if you multiply each term by 5, to eliminate the fraction?

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Compare this to the second equation, 

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4 0
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Step-by-step explanation:

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