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Rashid [163]
3 years ago
13

A lock on a fence door has a 4 digit combination. Each digit can be any number

Mathematics
2 answers:
Bas_tet [7]3 years ago
6 0

Answer:

D. 9990 possible combinations

Step-by-step explanation:

The first digit has 10 choices (can be all of them), the second digit also has 10 choices. The third and fourth digits also have 10 choices.

Multiply them together you get 10*10*10*10 = 10000 possible combinations.

But since all 4 characters cannot be the same, we subtract 10 from 10000 (there are 10 combinations which the 4 characters are the same: 1111, 2222, 3333, 4444, 5555, 6666, 7777, 8888, 9999, and 0000) and we get 9990.

Savatey [412]3 years ago
4 0

Answer:

D. 9990 possible combinations

Step-by-step explanation:

A lock on a fence door has a 4 digit combination. Each digit can be any number  between 0 – 9. The only restriction is that all 4 characters cannot be the same  (e.g. 1111, 2222, 3333, etc.). Therefore, there are 9990 possible combinations.

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Answer:

D.

Step-by-step explanation:

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3 years ago
Which algebraic expression is equivalent to the expression below 6(2x+5)+4x
Veronika [31]
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6 0
3 years ago
Tina is making a scale model of A monument that is 155 feet tall she uses a scale of 1 inch = 5 feet how tall should Tina make h
fenix001 [56]

Tina should make 31 inch tall model to replicate 155 feet tall monument.

Step-by-step explanation:

This problem can be solved by direct unitary methods easily-

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Thus, this means that Tina would need 155*1/5 = 31 inch tall model to replicate the complete length of the monument.

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