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3 years ago

8

When the elevator was out of service, Debi walked down 21 flights of stairs. She stopped to rest after every 3 flights. How many

times did Debi stop to rest?

2 answers:

andrezito [222]3 years ago

6 0

Debi stopped 7 times to rest.
Just divide 21 by 3

balandron [24]3 years ago

5 0

She stopped to rest every 7 flights.

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Answer:

For the code we have 3 selections.

The first selection is a digit that must be odd, so the options are {1, 3, 5, 7 ,9}

So we have 5 options.

The second selection is a letter from the set of all the letters (27) minus the set of the vowels (5)

So here we have 27 - 5 = 22 options

The third selection is also a letter from the previous set, but because each letter can be used only one time, and in the previous selection we already selected one of the letters, in this selection we have a letter less than in the previous selection.

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3 years ago

2. Writing a set in Roster Method means you list the elements of sets inside the braces separated by commas; while writing the s

ra1l [238]

The sets can either be presented in set builder form or roaster form. The

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Therefore;

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Find the exact value in the picture above

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