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SIZIF [17.4K]
3 years ago
14

The production of what number and 7 is less than 49

Mathematics
1 answer:
MArishka [77]3 years ago
4 0
Many numbers, when multiplied by 7, are less than 49.  We can find an inequality for numbers x that are sufficient.

Clearly, 7x < 49 is the desired inequality.  We divide by 7 to find that x < 7 determines working numbers.
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Answer:

  • digits used once: 12
  • repeated digits: 128

Step-by-step explanation:

In order for a number to be divisible by 4, its last two digits must be divisible by 4. This will be the case if either of these conditions holds:

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We must count the ways these conditions can be met with the given digits.

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Since we only have even numbers to work with, the ones digit must be an even multiple of 2: 4 or 8. (The tens digit cannot be odd.) The digits 4 and 8 comprise half of the available digits, so half of all possible numbers made from these digits will be divisible by 4.

<h3>digits used once</h3>

If the numbers must use each digit exactly once, there will be 4! = 24 of them. 24/2 = 12 of these 4-digit numbers will be divisible by 4.

<h3>repeated digits</h3>

Each of the four digits can have any of four values, so there will be 4^4 = 256 possible 4-digit numbers. Of these, 256/2 = 128 will be divisible by 4.

7 0
2 years ago
Read 2 more answers
B-c,when b=8 and c=7
elixir [45]
If I understand your question correctly then it's simple all you have to do is use the numbers in the place of the b and c so the question would be what is 8-7 which equals 1 
8 0
3 years ago
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