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r-ruslan [8.4K]
3 years ago
11

A locker combination system uses three digits from 0 to 9. How many different three-digit combinations with no digit repeated ar

e possible?
Mathematics
1 answer:
ruslelena [56]3 years ago
6 0

Answer:

Step-by-step explanation:

Given that a locker combination  system uses three digits from 0 to 9.

Repitition is not allowed.

Three digits can start with 0 also.

Here since order matters, permutation should be used.

Hence 3 digits for lock without repitition from 10 digits can be done in 10P3 ways

=10*9*8

=720

There are 720 different combinations

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3 years ago
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Katena32 [7]

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Tomas needs to cut a piece of wood for a model airplane he is building. He has four pieces of wood: 5 feet, 4 feet, 6 feet, and
blagie [28]

Answer:

Step-by-step explanation:

Alright, lets get started.

Tomas has four pieces of wood having each length = 5, 4, 6 and 3

The length of wood he needs to cut to make a model airplane = \sqrt{11}

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4 0
4 years ago
14. A plane traveled from California and back. It took one hour longer on the way out than it did on the way back. The plane's a
kow [346]

Answer:

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Step-by-step explanation:

Let the time for the trip out be represented by t. Then the time for the return trip is t-1. The distance was the same for both trips, so we have ...

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The trip out took 7 hours.

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